Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part 1: Basic requirements (ISO 10326-1:2016, Corrected version 2017-02)

This document specifies basic requirements for the laboratory testing of vibration transmission
through a vehicle seat to the occupant. These methods for measurement and analysis make it possible
to compare test results from different laboratories for equivalent seats.
It specifies the test method, the instrumentation requirements, the measuring assessment method and
the way to report the test result.
This document applies to specific laboratory seat tests which evaluate vibration transmission to the
occupants of any type of seat used in vehicles and mobile off-road machinery.
Application standards for specific vehicles refer to this document when defining the test input vibration
that is typical for the vibration characteristics of the type or class of vehicle or machinery in which the
seat is to be fitted.
NOTE Examples of application standards are given in the bibliography.

Mechanische Schwingungen - Laborverfahren zur Bewertung der Schwingungen von Fahrzeugsitzen - Teil 1: Grundlegende Anforderungen (ISO 10326-1:2016, korrigierte Fassung 2017-02)

Dieser Teil von ISO 10326 legt grundlegende Anforderungen an ein Laborverfahren zur Prüfung der Schwingungsübertragung über einen Fahrzeugsitz auf den Insassen fest. Diese Verfahren zur Messung und Analyse ermög¬lichen es, die von verschiedenen Laboratorien ermittelten Prüfergebnisse gleichartiger Sitze miteinander zu ver¬gleichen.
Er spezifiziert das Prüfverfahren, die Anforderungen an die Messgeräte, das Verfahren zur Beurteilung der Messergebnisse und die Art, wie die Prüfergebnisse zu dokumentieren sind.
Dieser Teil von ISO 10326 ist bei der Erarbeitung spezifischer Laborprüfverfahren heranzuziehen, mit denen die Schwingungsübertragung auf die Insassen für jegliche Art von Sitzen in Fahrzeugen und beweglichen Arbeitsmaschinen ermittelt wird.
Maschinenspezifische Normen für einzelne Fahrzeugarten, die die für die Fahrzeug  oder Maschinenart oder  gruppe, für die der Sitz zur Verwendung vorgesehen ist, charakteristische Prüf Erregerschwingung festlegen, sollten sich auf diesen Teil von ISO 10326 beziehen.

Vibrations mécaniques - Méthode en laboratoire pour l'évaluation des vibrations du siège de véhicule - Partie 1: Exigences de base (ISO 10326-1:2016, Version corrigée 2017-02)

ISO 10326-1:2016 spécifie des exigences de base relatives aux essais en laboratoire sur la transmission des vibrations, par l'intermédiaire des sièges, aux occupants d'un véhicule. Ces méthodes de mesure et d'analyse permettent de comparer les résultats d'essai obtenus dans différents laboratoires et concernant des sièges équivalents.
Il spécifie la méthode d'essai, les exigences relatives aux instruments, la méthode d'évaluation du mesurage et le mode d'établissement des rapports d'essai.
ISO 10326-1:2016 s'applique à des essais spécifiques en laboratoire sur les sièges, pour évaluer les vibrations transmises aux occupants des véhicules et engins mobiles tout terrain, quel que soit le type de siège utilisé.
Il convient que les normes d'application relatives à des types de véhicules spécifiques se réfèrent au présent document pour définir l'excitation d'essai caractéristique du comportement vibratoire du type ou de la classe de véhicule ou d'engin dans lequel le siège doit être installé.
NOTE Des exemples de normes d'applications sont donnés dans la bibliographie.

Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev vozil - 1. del: Osnovne zahteve (ISO 10326-1:2016, popravljena razlićica 2017-02)

Ta dokument določa osnovne zahteve za laboratorijske preskuse prenosa vibracij
prek sedeža vozila na uporabnika. Te metode za merjenje in analizo omogočajo primerjavo rezultatov preskusov enakovrednih sedežev iz različnih laboratorijev.
Standard določa preskusno metodo, merilne zahteve, metodo za ovrednotenje merjenja in način za sporočanje rezultata preskusa.
Ta dokument se uporablja za posebne laboratorijske preskuse sedežev za vrednotenje prenosa vibracij na
uporabnika katerekoli vrste sedeža, ki se uporablja v vozilih in mobilnih terenskih strojih.
Standardi uporabe za posebna vozila se sklicujejo na ta dokument pri določanju preskusne vhodne vibracije, ki je običajna za vibracijske značilnosti vrste ali razreda vozila oziroma stroja, v katerega se bo namestil sedež.
OPOMBA: primeri standardov uporabe so podani v bibliografiji.

General Information

Status
Published
Public Enquiry End Date
29-Oct-2015
Publication Date
29-Nov-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Nov-2016
Due Date
23-Jan-2017
Completion Date
30-Nov-2016

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SLOVENSKI STANDARD
SIST EN ISO 10326-1:2017
01-januar-2017
Nadomešča:
SIST EN 30326-1:2000
SIST EN 30326-1:2000/A1:2008
SIST EN 30326-1:2000/A2:2012

Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev vozil

- 1. del: Osnovne zahteve (ISO 10326-1:2016, popravljena razlićica 2017-02)

Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part 1:

Basic requirements (ISO 10326-1:2016, Corrected version 2017-02)
Mechanische Schwingungen - Laborverfahren zur Bewertung der Schwingungen von

Fahrzeugsitzen - Teil 1: Grundlegende Anforderungen (ISO 10326-1:2016, korrigierte

Fassung 2017-02)

Vibrations mécaniques - Méthode en laboratoire pour l'évaluation des vibrations du siège

de véhicule - Partie 1: Exigences de base (ISO 10326-1:2016, Version corrigée 2017-02)

Ta slovenski standard je istoveten z: EN ISO 10326-1:2016
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
43.020 Cestna vozila na splošno Road vehicles in general
SIST EN ISO 10326-1:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 10326-1:2017
---------------------- Page: 2 ----------------------
SIST EN ISO 10326-1:2017
EN ISO 10326-1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2016
EUROPÄISCHE NORM
ICS 13.160 Supersedes EN 30326-1:1994
English Version
Mechanical vibration - Laboratory method for evaluating
vehicle seat vibration - Part 1: Basic requirements (ISO
10326-1:2016, Corrected version 2017-02)

Vibrations mécaniques - Méthode en laboratoire pour Mechanische Schwingungen - Laborverfahren zur

l'évaluation des vibrations du siège de véhicule - Partie Bewertung der Schwingungen von Fahrzeugsitzen -

1: Exigences de base (ISO 10326-1:2016, Version Teil 1: Grundlegende Anforderungen (ISO 10326-

corrigée 2017-02) 1:2016, korrigierte Fassung 2017-02)
This European Standard was approved by CEN on 5 October 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10326-1:2016 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC [OJ L 157] aimed to be covered .................................................. 4

---------------------- Page: 4 ----------------------
SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
European foreword

This document (EN ISO 10326-1:2016) has been prepared by Technical Committee ISO/TC 108

“Mechanical vibration, shock and condition monitoring” in collaboration with Technical Committee

CEN/TC 231 “Mechanical vibration and shock” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be

withdrawn at the latest by May 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes EN 30326-1:1994.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive.

For relationship with EU Directive, see informative Annex ZA, which is an integral part of this

document.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 10326-1:2016, Corrected version 2017-02 has been approved by CEN as

EN ISO 10326-1:2016 without any modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC [OJ L 157] aimed to be covered

This European Standard has been prepared under a Commission's standardization request [M/396

concerning the development of European Standards related to machinery] to provide one voluntary

means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament

and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast) [OJ L 157].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding essential requirements

of that Directive and associated EFTA regulations.

Table ZA.1 — Correspondence between this European Standard and Annex I of Directive

2006/42/EC [OJ L 157]
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2006/42/EC of this EN
1.1.8 Seating and All normative clauses
1.5.9 Vibrations

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

Standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2 — Other Union legislation may be applicable to the products falling within the scope of this

standard.
---------------------- Page: 6 ----------------------
SIST EN ISO 10326-1:2017
INTERNATIONAL ISO
STANDARD 10326-1
Second edition
2016-10-15
Corrected version
2017-02
Mechanical vibration — Laboratory
method for evaluating vehicle seat
vibration —
Part 1:
Basic requirements
Vibrations mécaniques — Méthode en laboratoire pour l’évaluation
des vibrations du siège de véhicule —
Partie 1: Exigences de base
Reference number
ISO 10326-1:2016(E)
ISO 2016
---------------------- Page: 7 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General ............................................................................................................................................................................................................................ 2

5 Instrumentation .................................................................................................................................................................................................... 2

5.1 Acceleration transducers ............................................................................................................................................................... 2

5.2 Transducer mounting ........................................................................................................................................................................ 2

5.2.1 General...................................................................................................................................................................................... 2

5.2.2 Transducer mounting on the platform ......................................................................................................... 3

5.2.3 Transducer mounting on the seat pan and/or backrest ................................................................ 3

5.3 Frequency weighting ......................................................................................................................................................................... 4

5.4 Calibration .................................................................................................................................................................................................. 4

6 Vibration equipment ........................................................................................................................................................................................ 4

6.1 Physical characteristics ................................................................................................................................................................... 4

6.2 Control system......................................................................................................................................................................................... 5

7 Safety requirements ......................................................................................................................................................................................... 5

8 Test conditions ....................................................................................................................................................................................................... 5

8.1 Test seat ........................................................................................................................................................................................................ 5

8.1.1 General...................................................................................................................................................................................... 5

8.1.2 Run-in periods for suspension seats .............................................................................................................. 5

8.1.3 Measurement of suspension travel and adjustment to weight of test person ............ 6

8.1.4 Inclination of backrest ................................................................................................................................................ 7

8.2 Test persons and posture ............................................................................................................................................................... 7

8.3 Other possibilities ................................................................................................................................................................................ 8

9 Test input vibration ........................................................................................................................................................................................... 9

9.1 General ........................................................................................................................................................................................................... 9

9.2 Simulated input vibration test ................................................................................................................................................... 9

9.3 Tolerances on input vibration .................................................................................................................................................10

9.4 Transfer function with sinusoidal vibration input ................................................................................................10

9.5 Damping test ..........................................................................................................................................................................................10

9.5.1 Suspension seats ...........................................................................................................................................................10

9.5.2 Other seats .........................................................................................................................................................................11

10 Test procedure .....................................................................................................................................................................................................11

10.1 General ........................................................................................................................................................................................................11

10.2 Simulated input vibration test ................................................................................................................................................11

10.3 Damping test ..........................................................................................................................................................................................12

11 Acceptance ...............................................................................................................................................................................................................12

12 Test report ................................................................................................................................................................................................................12

Annex A (informative) Test method for assessing the ability of a seat suspension to control

the effects of impacts caused by over-travel .........................................................................................................................14

Annex B (informative) Example of a simulated input test signal specified by the PSD.................................20

Bibliography .............................................................................................................................................................................................................................22

© ISO 2016 – All rights reserved iii
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www . i so .org/ iso/ foreword .html.

The committee responsible for this document is ISO/TC 108, Mechanical vibration, shock and condition

monitoring, Subcommittee SC 4, Human exposure to mechanical vibration and shock.

This second edition cancels and replaces the first edition (ISO 10326-1:1992), which has been

technically revised. It also incorporates the amendments ISO 10326-1:1992/Amd 1:2007 and

ISO 10326-1:1992/Amd 2:2011.
A list of all parts in the ISO 10326 series can be found on the ISO website.

This corrected version of ISO 10326-1:2016 incorporates the following correction.

A.3.5 The corrupted symbol À was replaced with the correct symbol π in six instances.

iv © ISO 2016 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Introduction

Drivers, staff and passengers of vehicles (land, air or water) and mobile machinery are exposed

to mechanical vibration which interferes with their comfort, working efficiency and, in some

circumstances, safety and health. Such vehicles and mobile machines are often fitted with seats that are

designed and made in accordance with current state-of-the-art with regard to their capacity to control

or reduce transmitted whole-body vibration.

To assist in the development of such seats, specific test codes have been, or are being, produced to

evaluate the performance of seats. The following basic requirements have therefore been developed

to give guidance for the specification of laboratory testing of vibration transmission through a vehicle

seat to the occupant and for the evaluation of the ability of a seat to control the shock arising from over-

travel of the suspension.

The seat constitutes the last stage of suspension before the driver. To be efficient at attenuating the

vibration, the suspension seat should be chosen according to the dynamic characteristics of the vehicle.

Any performance criteria provided should be set in accordance with what is attainable using best design

practice. Such criteria do not necessarily ensure the complete protection of the operator against risks

associated with exposure to vibration and shock which are generally believed to be risk of spinal injury.

© ISO 2016 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 10326-1:2017
---------------------- Page: 12 ----------------------
SIST EN ISO 10326-1:2017
INTERNATIONAL STANDARD ISO 10326-1:2016(E)
Mechanical vibration — Laboratory method for evaluating
vehicle seat vibration —
Part 1:
Basic requirements
1 Scope

This document specifies basic requirements for the laboratory testing of vibration transmission

through a vehicle seat to the occupant. These methods for measurement and analysis make it possible

to compare test results from different laboratories for equivalent seats.

It specifies the test method, the instrumentation requirements, the measuring assessment method and

the way to report the test result.

This document applies to specific laboratory seat tests which evaluate vibration transmission to the

occupants of any type of seat used in vehicles and mobile off-road machinery.

Application standards for specific vehicles refer to this document when defining the test input vibration

that is typical for the vibration characteristics of the type or class of vehicle or machinery in which the

seat is to be fitted.
NOTE Examples of application standards are given in the bibliography.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 2631-1, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —

Part 1: General requirements

ISO 5347 (all parts), Methods for the calibration of vibration and shock pick-ups

ISO 8041, Human response to vibration — Measuring instrumentation

ISO 13090-1, Mechanical vibration and shock — Guidance on safety aspects of tests and experiments with

people — Part 1: Exposure to whole-body mechanical vibration and repeated shock

ISO 16063 (all parts), Methods for the calibration of vibration and shock transducers

3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
© ISO 2016 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
4 General

The measurement and assessment methods given in this document comply with the present practice

standardized in ISO 2631-1. The measuring equipment and the frequency weightings shall be in

accordance with ISO 8041.

The primary test for the vibration characteristics of the seat involves measurements under conditions

which simulate the range of actual uses of a vehicle or machine. For applications where occasional

severe shocks or transient vibration can be expected (and in particular for seats whose suspension

travel is short, such as those intended for use on industrial trucks or off-road vehicles), in addition to

the damping test, a secondary test is required to ensure that the seat responds acceptably. Machinery-

specific standards shall give guidance on the need for this secondary test which comprises a method

for assessing the accelerations associated with impact with the suspension end-stops when over-travel

occurs. The test is described in Annex A.
5 Instrumentation
5.1 Acceleration transducers

The measuring systems selected for the evaluation of vibration at the seat mounting base or platform

of the vibration simulator and that selected for the evaluation of vibration transmitted to the seat

occupant, or to an inert mass when used, shall have similar characteristics.

The characteristics of the vibration measuring system, accelerometers, signal conditioning and data

acquisition equipment, including recording devices, shall be specified in the relevant application

standard, especially the dynamic range, sensitivity, accuracy, linearity and overload capacity.

5.2 Transducer mounting
5.2.1 General

One accelerometer for each required test direction shall be located on the platform (P) at the place

of the vibration transmission to the seat. The other accelerometer(s) shall be located at the interface

between the human body and the seat, at either the seat pan (S) and/or the backrest (B) (see Figure 1).

2 © ISO 2016 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Dimensions in millimetres

Figure 1 — Location of the accelerometers on the platform (P), on the seat pan (S) and on the

backrest (B)
5.2.2 Transducer mounting on the platform

The accelerometer(s) on the platform shall be located within a circle with a diameter of 200 mm

centred directly below the seat accelerometer(s). The measuring directions shall be aligned parallel to

the movement of the platform.
5.2.3 Transducer mounting on the seat pan and/or backrest

The accelerometers on the seat pan shall be attached in the centre of a mounting disc with a total

diameter of 250 mm ± 50 mm. The disc shall be as thin as possible (see Figure 2). The height shall

not be more than 12 mm. This semi-rigid mounting disc of approximately 80 durometer to 90

durometer units (A-scale) moulded rubber or plastics material shall have a centre cavity in which to

place the accelerometers. The accelerometers shall be attached to a thin metal disc with a thickness of

1,5 mm ± 0,2 mm and a diameter of 75 mm ± 5 mm.

The mounting disc shall be placed on the surface of the seat pan and taped to the cushion in such a way

that the accelerometers are located midway between the ischial tuberosities of the seat occupant with a

tolerance to be defined in the relevant application standards. Alternative positioning of the disc may be

recommended for certain applications. Any variation from the position here defined shall be specified

in application standards.

When tests are performed without a person sitting on the seat, e.g. during damping tests, the disc shall

be placed in the same position as if a person were seated in the seat.

If measurements are made on the backrest, the accelerometers shall be (horizontally) located in the

vertical longitudinal plane through the centre-line of the seat. The relevant application standards shall

specify the vertical position of the accelerometers. The measurement axes shall be aligned parallel to

the basicentric coordinate system.

Besides the semi-rigid mounting disc recommended for soft or highly contoured cushions, a rigid disc

with a generally flat surface or an individual-form design may be used. Such discs may be, for instance,

required for testing rail vehicle passenger seats. The transducer mounting should be made of low-mass

© ISO 2016 – All rights reserved 3
---------------------- Page: 15 ----------------------
SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)

materials, so that the resonant frequency of the mounting is at least four times the highest frequency

specified for the test.

For practical reasons, it is usually not possible to align perfectly the accelerometers in the disc

with the axes of motion of the platform. In a tolerance range within 15° of the appropriate axes, the

accelerometers may be considered as aligned parallel to the axes of interest. For deviations greater

than 15°, acceleration should be measured along two axes and the acceleration vector sum along the

axis of interest should be calculated.
Dimensions in millimetres
Key
1 thin metal disc for accelerometer mount and added centre rigidity
2 appropriate cavity for accelerometer(s)
Figure 2 — Semi-rigid mounting disc
5.3 Frequency weighting
Frequency weighting shall be in accordance with ISO 8041.
5.4 Calibration

The instrumentation shall be calibrated in accordance with ISO 16063-1 and, depending on the type of

measuring system used, to the relevant part of ISO 5347 or ISO 16063.

It is recommended to check the whole measuring chain following the specifications given in ISO 8041.

Calibration shall be made before and after eac
...

SLOVENSKI STANDARD
SIST EN ISO 10326-1:2017
01-januar-2017
1DGRPHãþD
SIST EN 30326-1:2000
SIST EN 30326-1:2000/A1:2008
SIST EN 30326-1:2000/A2:2012

Mehanske vibracije - Laboratorijska metoda za ovrednotenje vibracij sedežev vozil

- 1. del: Osnovne zahteve (ISO 10326-1:2016)

Mechanical vibration - Laboratory method for evaluating vehicle seat vibration - Part 1:

Basic requirements (ISO 10326-1:2016)
Mechanische Schwingungen - Laborverfahren zur Bewertung der Schwingungen von
Fahrzeugsitzen - Teil 1: Grundlegende Anforderungen (ISO 10326-1:2016)

Vibrations mécaniques - Méthode en laboratoire pour l'évaluation des vibrations du siège

de véhicule - Partie 1: Exigences de base (ISO 10326-1:2016)
Ta slovenski standard je istoveten z: EN ISO 10326-1:2016
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
43.020 Cestna vozila na splošno Road vehicles in general
SIST EN ISO 10326-1:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 10326-1:2017
---------------------- Page: 2 ----------------------
SIST EN ISO 10326-1:2017
EN ISO 10326-1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2016
EUROPÄISCHE NORM
ICS 13.160; 43.020; 53.100; 65.060.10 Supersedes EN 30326-1:1994
English Version
Mechanical vibration - Laboratory method for evaluating
vehicle seat vibration - Part 1: Basic requirements (ISO
10326-1:2016)

Vibrations mécaniques - Méthode en laboratoire pour Mechanische Schwingungen - Laborverfahren zur

l'évaluation des vibrations du siège de véhicule - Partie Bewertung der Schwingungen von Fahrzeugsitzen -

1: Exigences de base (ISO 10326-1:2016) Teil 1: Grundlegende Anforderungen (ISO 10326-

1:2016)
This European Standard was approved by CEN on 5 October 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10326-1:2016 E

worldwide for CEN national Members.
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SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC [OJ L 157] aimed to be covered .................................................. 4

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SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
European foreword

This document (EN ISO 10326-1:2016) has been prepared by Technical Committee ISO/TC 108

“Mechanical vibration, shock and condition monitoring” in collaboration with Technical Committee

CEN/TC 231 “Mechanical vibration and shock” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be

withdrawn at the latest by May 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes EN 30326-1:1994.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive.

For relationship with EU Directive, see informative Annex ZA, which is an integral part of this

document.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 10326-1:2016 has been approved by CEN as EN ISO 10326-1:2016 without any

modification.
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SIST EN ISO 10326-1:2017
EN ISO 10326-1:2016 (E)
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC [OJ L 157] aimed to be covered

This European Standard has been prepared under a Commission's standardization request [M/396

concerning the development of European Standards related to machinery] to provide one voluntary

means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament

and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast) [OJ L 157].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding essential requirements

of that Directive and associated EFTA regulations.

Table ZA.1 — Correspondence between this European Standard and Annex I of Directive

2006/42/EC [OJ L 157]
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2006/42/EC of this EN
1.1.8 Seating and All normative clauses
1.5.9 Vibrations

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

Standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2 — Other Union legislation may be applicable to the products falling within the scope of this

standard.
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SIST EN ISO 10326-1:2017
INTERNATIONAL ISO
STANDARD 10326-1
Second edition
2016-10-15
Mechanical vibration — Laboratory
method for evaluating vehicle seat
vibration —
Part 1:
Basic requirements
Vibrations mécaniques — Méthode en laboratoire pour l’évaluation
des vibrations du siège de véhicule —
Partie 1: Exigences de base
Reference number
ISO 10326-1:2016(E)
ISO 2016
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
COPYRIGHT PROTECTED DOCUMENT
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ii © ISO 2016 – All rights reserved
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General ............................................................................................................................................................................................................................ 2

5 Instrumentation .................................................................................................................................................................................................... 2

5.1 Acceleration transducers ............................................................................................................................................................... 2

5.2 Transducer mounting ........................................................................................................................................................................ 2

5.2.1 General...................................................................................................................................................................................... 2

5.2.2 Transducer mounting on the platform ......................................................................................................... 3

5.2.3 Transducer mounting on the seat pan and/or backrest ................................................................ 3

5.3 Frequency weighting ......................................................................................................................................................................... 4

5.4 Calibration .................................................................................................................................................................................................. 4

6 Vibration equipment ........................................................................................................................................................................................ 4

6.1 Physical characteristics ................................................................................................................................................................... 4

6.2 Control system......................................................................................................................................................................................... 5

7 Safety requirements ......................................................................................................................................................................................... 5

8 Test conditions ....................................................................................................................................................................................................... 5

8.1 Test seat ........................................................................................................................................................................................................ 5

8.1.1 General...................................................................................................................................................................................... 5

8.1.2 Run-in periods for suspension seats .............................................................................................................. 5

8.1.3 Measurement of suspension travel and adjustment to weight of test person ............ 6

8.1.4 Inclination of backrest ................................................................................................................................................ 7

8.2 Test persons and posture ............................................................................................................................................................... 7

8.3 Other possibilities ................................................................................................................................................................................ 8

9 Test input vibration ........................................................................................................................................................................................... 9

9.1 General ........................................................................................................................................................................................................... 9

9.2 Simulated input vibration test ................................................................................................................................................... 9

9.3 Tolerances on input vibration .................................................................................................................................................10

9.4 Transfer function with sinusoidal vibration input ................................................................................................10

9.5 Damping test ..........................................................................................................................................................................................10

9.5.1 Suspension seats ...........................................................................................................................................................10

9.5.2 Other seats .........................................................................................................................................................................11

10 Test procedure .....................................................................................................................................................................................................11

10.1 General ........................................................................................................................................................................................................11

10.2 Simulated input vibration test ................................................................................................................................................11

10.3 Damping test ..........................................................................................................................................................................................12

11 Acceptance ...............................................................................................................................................................................................................12

12 Test report ................................................................................................................................................................................................................12

Annex A (informative) Test method for assessing the ability of a seat suspension to control

the effects of impacts caused by over-travel .........................................................................................................................14

Annex B (informative) Example of a simulated input test signal specified by the PSD.................................20

Bibliography .............................................................................................................................................................................................................................22

© ISO 2016 – All rights reserved iii
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/TC 108, Mechanical vibration, shock and condition

monitoring, Subcommittee SC 4, Human exposure to mechanical vibration and shock.

This second edition cancels and replaces the first edition (ISO 10326-1:1992), which has been

technically revised. It also incorporates the amendments ISO 10326-1:1992/Amd 1:2007 and

ISO 10326-1:1992/Amd 2:2011.
A list of all parts in the ISO 10326 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Introduction

Drivers, staff and passengers of vehicles (land, air or water) and mobile machinery are exposed

to mechanical vibration which interferes with their comfort, working efficiency and, in some

circumstances, safety and health. Such vehicles and mobile machines are often fitted with seats that are

designed and made in accordance with current state-of-the-art with regard to their capacity to control

or reduce transmitted whole-body vibration.

To assist in the development of such seats, specific test codes have been, or are being, produced to

evaluate the performance of seats. The following basic requirements have therefore been developed

to give guidance for the specification of laboratory testing of vibration transmission through a vehicle

seat to the occupant and for the evaluation of the ability of a seat to control the shock arising from over-

travel of the suspension.

The seat constitutes the last stage of suspension before the driver. To be efficient at attenuating the

vibration, the suspension seat should be chosen according to the dynamic characteristics of the vehicle.

Any performance criteria provided should be set in accordance with what is attainable using best design

practice. Such criteria do not necessarily ensure the complete protection of the operator against risks

associated with exposure to vibration and shock which are generally believed to be risk of spinal injury.

© ISO 2016 – All rights reserved v
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SIST EN ISO 10326-1:2017
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SIST EN ISO 10326-1:2017
INTERNATIONAL STANDARD ISO 10326-1:2016(E)
Mechanical vibration — Laboratory method for evaluating
vehicle seat vibration —
Part 1:
Basic requirements
1 Scope

This document specifies basic requirements for the laboratory testing of vibration transmission

through a vehicle seat to the occupant. These methods for measurement and analysis make it possible

to compare test results from different laboratories for equivalent seats.

It specifies the test method, the instrumentation requirements, the measuring assessment method and

the way to report the test result.

This document applies to specific laboratory seat tests which evaluate vibration transmission to the

occupants of any type of seat used in vehicles and mobile off-road machinery.

Application standards for specific vehicles refer to this document when defining the test input vibration

that is typical for the vibration characteristics of the type or class of vehicle or machinery in which the

seat is to be fitted.
NOTE Examples of application standards are given in the bibliography.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 2631-1, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —

Part 1: General requirements

ISO 5347 (all parts), Methods for the calibration of vibration and shock pick-ups

ISO 8041, Human response to vibration — Measuring instrumentation

ISO 13090-1, Mechanical vibration and shock — Guidance on safety aspects of tests and experiments with

people — Part 1: Exposure to whole-body mechanical vibration and repeated shock

ISO 16063 (all parts), Methods for the calibration of vibration and shock transducers

3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
© ISO 2016 – All rights reserved 1
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SIST EN ISO 10326-1:2017
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4 General

The measurement and assessment methods given in this document comply with the present practice

standardized in ISO 2631-1. The measuring equipment and the frequency weightings shall be in

accordance with ISO 8041.

The primary test for the vibration characteristics of the seat involves measurements under conditions

which simulate the range of actual uses of a vehicle or machine. For applications where occasional

severe shocks or transient vibration can be expected (and in particular for seats whose suspension

travel is short, such as those intended for use on industrial trucks or off-road vehicles), in addition to

the damping test, a secondary test is required to ensure that the seat responds acceptably. Machinery-

specific standards shall give guidance on the need for this secondary test which comprises a method

for assessing the accelerations associated with impact with the suspension end-stops when over-travel

occurs. The test is described in Annex A.
5 Instrumentation
5.1 Acceleration transducers

The measuring systems selected for the evaluation of vibration at the seat mounting base or platform

of the vibration simulator and that selected for the evaluation of vibration transmitted to the seat

occupant, or to an inert mass when used, shall have similar characteristics.

The characteristics of the vibration measuring system, accelerometers, signal conditioning and data

acquisition equipment, including recording devices, shall be specified in the relevant application

standard, especially the dynamic range, sensitivity, accuracy, linearity and overload capacity.

5.2 Transducer mounting
5.2.1 General

One accelerometer for each required test direction shall be located on the platform (P) at the place

of the vibration transmission to the seat. The other accelerometer(s) shall be located at the interface

between the human body and the seat, at either the seat pan (S) and/or the backrest (B) (see Figure 1).

2 © ISO 2016 – All rights reserved
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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)
Dimensions in millimetres

Figure 1 — Location of the accelerometers on the platform (P), on the seat pan (S) and on the

backrest (B)
5.2.2 Transducer mounting on the platform

The accelerometer(s) on the platform shall be located within a circle with a diameter of 200 mm

centred directly below the seat accelerometer(s). The measuring directions shall be aligned parallel to

the movement of the platform.
5.2.3 Transducer mounting on the seat pan and/or backrest

The accelerometers on the seat pan shall be attached in the centre of a mounting disc with a total

diameter of 250 mm ± 50 mm. The disc shall be as thin as possible (see Figure 2). The height shall

not be more than 12 mm. This semi-rigid mounting disc of approximately 80 durometer to 90

durometer units (A-scale) moulded rubber or plastics material shall have a centre cavity in which to

place the accelerometers. The accelerometers shall be attached to a thin metal disc with a thickness of

1,5 mm ± 0,2 mm and a diameter of 75 mm ± 5 mm.

The mounting disc shall be placed on the surface of the seat pan and taped to the cushion in such a way

that the accelerometers are located midway between the ischial tuberosities of the seat occupant with a

tolerance to be defined in the relevant application standards. Alternative positioning of the disc may be

recommended for certain applications. Any variation from the position here defined shall be specified

in application standards.

When tests are performed without a person sitting on the seat, e.g. during damping tests, the disc shall

be placed in the same position as if a person were seated in the seat.

If measurements are made on the backrest, the accelerometers shall be (horizontally) located in the

vertical longitudinal plane through the centre-line of the seat. The relevant application standards shall

specify the vertical position of the accelerometers. The measurement axes shall be aligned parallel to

the basicentric coordinate system.

Besides the semi-rigid mounting disc recommended for soft or highly contoured cushions, a rigid disc

with a generally flat surface or an individual-form design may be used. Such discs may be, for instance,

required for testing rail vehicle passenger seats. The transducer mounting should be made of low-mass

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SIST EN ISO 10326-1:2017
ISO 10326-1:2016(E)

materials, so that the resonant frequency of the mounting is at least four times the highest frequency

specified for the test.

For practical reasons, it is usually not possible to align perfectly the accelerometers in the disc

with the axes of motion of the platform. In a tolerance range within 15° of the appropriate axes, the

accelerometers may be considered as aligned parallel to the axes of interest. For deviations greater

than 15°, acceleration should be measured along two axes and the acceleration vector sum along the

axis of interest should be calculated.
Dimensions in millimetres
Key
1 thin metal disc for accelerometer mount and added centre rigidity
2 appropriate cavity for accelerometer(s)
Figure 2 — Semi-rigid mounting disc
5.3 Frequency weighting
Frequency weighting shall be in accordance with ISO 8041.
5.4 Calibration

The instrumentation shall be calibrated in accordance with ISO 16063-1 and, depending on the type of

measuring system used, to the relevant part of ISO 5347 or ISO 16063.

It is recommended to check the whole measuring chain following the specifications given in ISO 8041.

Calibration shall be made before and after each test series.

Where necessary, the output from each accelerometer amplifier shall be zeroed after mounting the

accelerometers in the test position.
6 Vibration equipment
6.1 Physical characteristics

The minimum equipment required is a vibrator capable of driving the platform in the vertical and/or

horizontal directions. Application standards may define situations where it is appropriat

...

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