kSIST prEN ISO 10846-5:2009

Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 5: Driving point method for determination of the low frequency transfer stiffness of resilient supports for translatory motion (ISO/DIS 10846-5:2005)

2007 06 07 WI deleted at ISO because it did not progress to publication within the maximum timeframe. However, the work has again started at ISO, thus a new work item will be created.

Akustik und Schwingungstechnik - Laborverfahren zur Messung der vibro-akustischen Transfereigenschaften elastischer Elemente - Teil 5: Ermittlung der Transfersteifigkeit elastischer Stützelemente aus der Eingangssteifigkeit bei Anregung in translatorischer Richtung und tiefen Frequenzen (ISO/DIS 10846-5:2005)

Dieser Teil von ISO 10846 legt ein Verfahren zur Ermittlung der Transfersteifigkeit elastischer Stützelemente aus der Eingangssteifigkeit in translatorischer Richtung bei tiefen Frequenzen unter vorgegebener Vorlast fest. Das Laborverfahren umfasst die Messung der Schwingungen und Kräfte eingangsseitig bei fester Einspannung ausgangsseitig und heißt Verfahren unter Verwendung der Eingangssteifigkeit. Das Verfahren gilt für Prüfkörper mit parallelen Anschlussflächen (siehe Bild 1).
Elastische Elemente, für die dieser Teil von ISO 10846 zutrifft, werden verwendet,
a)   um die Übertragung von Schwingungen im tieffrequenten Teil des Hörbereichs (typischerweise 20 Hz bis 200 Hz) auf eine Struktur zu verringern; diese Struktur kann z. B. unerwünschten Schall in Fluide abstrahlen (Luftschall, Wasserschall und dergleichen);
b)   um die Übertragung tieffrequenter Schwingungen zu verringern (typischerweise 1 Hz bis 80 Hz); solche Schwingungen können z. B. auf den Menschen einwirken oder Schäden an Strukturen beliebiger Größe hervorrufen, wenn diese Schwingungen zu stark sind.
ANMERKUNG 1   In der Praxis führt die Größe der zur Verfügung stehenden Prüfaufbauten zu Einschränkungen der Prüfung sehr kleiner und sehr großer elastischer Stützelemente.
ANMERKUNG 2   Das Verfahren gilt auch für Proben von großflächigen Stützelementen, wie Streifen und Matten. Ob durch die Probe das Verhalten des gesamten Systems ausreichend beschrieben wird, liegt in der Verantwortung des Anwenders dieses Teils von ISO 10846.
Dieser Teil von ISO 10846 gilt für Messungen in translatorischer Richtung sowohl normal als auch transversal (parallel) zu den Anschlussflächen.
Das Verfahren gilt im Frequenzbereich von f1 = 1 Hz bis zu einer oberen Grenzfrequenz fUL. Meistens ist 50 Hz L f UL L 200 Hz.

Acoustique et vibrations - Mesurage en laboratoire des propriétés de transfert vibro-acoustique des éléments élastiques - Partie 5: Méthode du point d'application pour la détermination de la raideur de transfert a basse fréquence en translation des supports élastiques (ISO/DIS 10846-5:2005)

Akustika in vibracije - Laboratorijsko merjenje vibro-akustičnih prenosnih lastnosti elastičnih elementov - 5. del: Točkovna metoda za določanje nizkofrekvenčne prenosne togosti elastičnih podpor za translatorno gibanje (ISO/DIS 10846-5:2005)

General Information

• Status: Not Published
• ICS: 17.140.01 - Acoustic measurements and noise abatement in general
• ICS: 17.160 - Vibrations, shock and vibration measurements
• Technical Committee: AKU - Acoustics
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 06-Nov-2008
• Due Date: 25-Dec-2008
• Completion Date: 04-Dec-2008
• Directive: 89/106/EEC - Construction products
• Ref Project: prEN ISO 10846-5 - Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 5: Driving point method for determination of the low frequency transfer stiffness of resilient supports for translatory motion (ISO/DIS 10846-5:2005)

Standards Content (Sample)

SLOVENSKI oSIST prEN ISO 10846-5:2006

PREDSTANDARD
januar 2006
Akustika in vibracije - Laboratorijsko merjenje vibro-akustičnih prenosnih
lastnosti elastičnih elementov – 5. del: Točkovna metoda za določanje
nizkofrekvenčne prenosne togosti elastičnih podpor za translatorno gibanje
(istoveten prEN ISO 10846-5:2005)
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer
properties of resilient elements - Part 5: Driving point method for determination of
the low frequency transfer stiffness of resilient supports for translatory motion
(ISO/DIS 108
ICS 17.140.01 Referenčna številka
oSIST prEN ISO 10846-5:2006(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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EUROPEAN STANDARD
DRAFT
prEN ISO 10846-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS

English Version
Acoustics and vibration - Laboratory measurement of vibro-
acoustic transfer properties of resilient elements - Part 5: Driving
point method for determination of the low frequency transfer
stiffness of resilient supports for translatory motion (ISO/DIS
10846-5:2005)
Acoustique et vibrations - Mesurage en laboratoire des
propriétés de transfert vibro-acoustique des éléments
élastiques - Partie 5: Méthode du point d'application pour la
détermination de la raideur de transfert à basse fréquence
en translation des supports élastiques (ISO/DIS 10846-
5:2005)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 211.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 10846-5:2005: E
worldwide for CEN national Members.

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prEN ISO 10846-5:2005 (E)




Foreword

This document (prEN ISO 10846-5:2005) has been prepared by Technical Committee ISO/TC
43 "Acoustics" in collaboration with Technical Committee CEN/TC 211 "Acoustics", the
secretariat of which is held by DS.

This document is currently submitted to the parallel Enquiry.


Endorsement notice

The text of ISO 10846-5:2005 has been approved by CEN as prEN ISO 10846-5:2005 without
any modifications.

2

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DRAFT INTERNATIONAL STANDARD ISO/DIS 10846-5
ISO/TC 43/SC 1 Secretariat: DS
Voting begins on: Voting terminates on:
2005-11-17 2006-04-17
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Acoustics and vibration — Laboratory measurement of vibro-
acoustic transfer properties of resilient elements —
Part 5:
Driving point method for determination of the low frequency
transfer stiffness of resilient supports for translatory motion
Acoustique et vibrations — Mesurage en laboratoire des propriétés de transfert vibro-acoustique des éléments
élastiques —
Partie 5: Méthode du point d'application pour la détermination de la raideur de transfert à basse fréquence en
translation des supports élastiques
ICS 17.140.01

ISO/CEN PARALLEL ENQUIRY
The CEN Secretary-General has advised the ISO Secretary-General that this ISO/DIS covers a subject
of interest to European standardization. In accordance with the ISO-lead mode of collaboration as
defined in the Vienna Agreement, consultation on this ISO/DIS has the same effect for CEN
members as would a CEN enquiry on a draft European Standard. Should this draft be accepted, a
final draft, established on the basis of comments received, will be submitted to a parallel two-month FDIS
vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
© International Organization for Standardization, 2005

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ISO/DIS 10846-5
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Violators may be prosecuted.
©
ii ISO 2005 – All rights reserved

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ISO/DIS 10846-5
Contents Page
Foreword .iii
Introduction.iii
1 Scope.3
2 Normative references.3
3 Terms and definitions .3
4 Principle.3
5 Test arrangements .3
5.1 Normal translations.3
5.1.1 Overview.3
5.1.2 The resilient support under test .3
5.1.3 Static preloading system.3
5.1.4 Force measurement system.3
5.1.5 Acceleration measurement system.3
5.1.6 Dynamic excitation system .3
5.2 Transverse translations.3
5.2.1 Overview.3
5.2.2 Resilient support under test.3
5.2.3 Static preloading system.3
5.2.4 Force measurement system.3
5.2.5 Acceleration measurement system.3
5.2.6 Dynamic excitation system .3
5.3 Suppression of unwanted vibrations .3
5.3.1 General .3
5.3.2 Normal direction.3
5.3.3 Transverse direction .3
6 Criteria for the adequacy of the test arrangement.3
6.1 General requirements .3
6.1.1 Frequency range.3
6.1.2 Limitation due to the acceleration of the output flange .3
6.1.3 Limitation due to unwanted input vibrations.3
6.2 Determination of upper limiting frequency.3
6.3 Force transducers .3
6.4 Accelerometers.3
6.5 Summation of signals .3
6.6 Analysers .3
7 Test procedures.3
7.1 Selection of force measurement system and force distribution plates.3
7.2 Installation of the test element.3
7.3 Mounting and connection of accelerometers.3
7.4 Mounting and connections of the vibration exciter.3
7.5 Source signal .3
7.6 Measurements .3
7.6.1 General .3
7.6.2 Validity of the measurements .3
7.6.3 Measurement uncertainty.3
7.7 Test for linearity.3
8 Evaluation of test results.3
8.1 Calculation of dynamic driving-point stiffness .3
© ISO 2005 – All rights reserved iii

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ISO/DIS 10846-5
8.2 One-third-octave-band values of the frequency-averaged dynamic driving-point stiffness.3
8.3 One-third-octave-band values of the frequency-averaged transfer stiffness .3
8.4 Presentation of one-third-octave-band results.3
8.5 Presentation of narrow-band data .3
9 Information to be recorded .3
10 Test report.3
Annex A (informative) Static load-deflection curve.3
Annex B (informative) Measurement uncertainty .3
B.1 General.3
B.2 Level of frequency-averaged dynamic transfer stiffness.3
B.3 Standard uncertainties.3
B.3.1 Signal processing and background noise .3
B.3.2 Instrumentation.3
B.3.3 Installation of the test element.3
B.3.4 Laboratory test rig .3
B.3.5 Difference between driving point stiffness and transfer stiffness .3
B.4 Contributions to combined measurement uncertainty.3
B.5 Calculation of expanded uncertainty for a coverage probability of 95 %.3
Bibliography.3

iv © ISO 2005 – All rights reserved

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ISO/DIS 10846-5
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 10846-5 was prepared jointly by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise,
and ISO/TC 108, Mechanical vibration and shock.
ISO 10846 consists of the following parts, under the general title Acoustics and vibration — Laboratory
measurement of vibro-acoustic transfer properties of resilient elements:
 Part 1: Principles and guidelines
 Part 2: Direct method for determination of the dynamic stiffness of resilient supports for translatory motion
 Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory
motion
 Part 4: Dynamic stiffness of elements other than resilient supports for translatory motion
 Part 5: Driving point method for determination of the low frequency transfer stiffness of resilient supports
for translatory motion
Annexes A to B of this part of ISO 10846 are for information only.
© ISO 2005 – All rights reserved v

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ISO/DIS 10846-5
Introduction
Passive vibration isolators of various kinds are used to reduce the transmission of vibration. Examples are
automobile engine mounts, resilient supports for buildings, resilient mounts and flexible shaft couplings for
shipboard machinery and small isolators in household appliances.

This part of ISO 10846 specifies a driving point method for measuring the low-frequency dynamic transfer
stiffness function of linear resilient supports. This includes resilient supports with non-linear static load-
deflection characteristics provided that the elements show an approximate linearity for vibration behaviour for
a given static preload. This part of ISO 10846 belongs to a series of International Standards on methods for
the laboratory measurement of vibro-acoustic properties of resilient elements, which also includes documents
on measurement principles, on a direct method and on an indirect method. ISO 10846-1 provides global
guidance for the selection of the appropriate International Standard.

The laboratory conditions described in this part of ISO 10846 include the application of static preload, where
appropriate.

The results of the method described in this part of ISO 10846 are useful for resilient supports that are used to
prevent low-frequency vibration problems or to attenuate structure-borne sound in the lower part of the audible
frequency range. The method does not characterize completely resilient supports that are used to attenuate
shock excursions.

vi © ISO 2005 – All rights reserved

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DRAFT INTERNATIONAL STANDARD ISO/DIS 10846-5

Acoustics and vibration — Laboratory measurement of vibro-
acoustic transfer properties of resilient elements — Part 5:
Driving point method for determination of the low-frequency
transfer stiffness of resilient supports for translatory motion
1 Scope
This part of ISO 10846 specifies a driving point method for determining the low-frequency transfer stiffness for
translations of resilient supports, under specified preload. The method concerns the laboratory measurement
of vibrations and forces on the input side with the output side blocked, and is called “driving point method”.
The method is applicable to test elements with parallel flanges (see Figure 1).
Resilient elements, which are the subject of this part of ISO 10846, are those, which are used to reduce
a) the transmission of vibration in the lower part of the audible frequency range (typically 20 Hz – 200 Hz) to
a structure which may, for example, radiate unwanted fluid-borne sound (airborne, waterborne or others);
b) the transmission of low-frequency vibration (typically 1 Hz to 80 Hz) which may, for example, act upon
human subjects or cause damage to structures of any size when vibration is too severe.
NOTE 1 In practice the size of available test rig(s) determines restrictions for very small and for very large resilient
supports.
NOTE 2 Samples of continuous supports of strips and mats are included in the method. Whether or not the sample
describes the behaviour of the complex system sufficiently is the responsibility of the user of this part of ISO 10846.
Measurements for translations normal and transverse to the flanges are covered in this part of ISO 10846.
The method covers the frequency range from f = 1 Hz to the upper limiting frequency f .
1 UL
Typically 50 Hz ≤ f ≤ 200 Hz.
UL



NOTE 1 When a resilient support has no parallel flanges, an auxiliary fixture should be included as part of the test
element to arrange for parallel flanges.
NOTE 2 Arrows indicate load direction.
Figure 1 — Example of resilient supports with parallel flanges
© ISO 2005 – All rights reserved 1

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ISO/DIS 10846-5
The data obtained according to the method specified in this part of ISO 10846 can be used for:
 product information provided by manufacturers and to suppliers;
 information during product development;
 quality control, and
 calculation of the transfer of vibration through isolators.
2 Normative references
The following referenced documents are indispensable for the application 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 266, Acoustics – Preferred frequencies
ISO 2041, Vibration and shock – Vocabulary
ISO 5348, Mechanical vibration and shock – Mechanical mounting of accelerometers
ISO 7626-1, Vibration and shock – Experimental determination of mechanical mobility – Part 1: Basic
definitions and transducers
ISO 10846-1, Acoustics and vibration – Laboratory measurement of vibro-acoustic transfer properties of
resilient elements – Part 1: Principles and guidelines
ISO 16063-21, Methods for the calibration of vibration and shock transducers – Part 21: Vibration calibration
by comparison to a reference transducer
GUM, Guide to the expression of uncertainty in measurement. BIPM/IEC/IFCC/ISO/OIML/IUPAC/
1)
IUPAP,1993
3 Terms and definitions
For the purposes of this part of ISO 10846, the terms and definitions given in ISO 2041 and the following
apply.
3.1
vibration isolator
resilient element
isolator designed to attenuate the transmission of the vibration in a certain frequency range
[ISO 2041:1990, definition 2.110]
3.2
resilient support
vibration isolator(s) suitable for supporting a machine, a building or another type of structure
3.3
test element
resilient support under test including flanges and auxiliary fixtures, if any

1) Corrected and reprinted in 2005.
2 © ISO 2005 – All rights reserved

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ISO/DIS 10846-5
3.4
blocking force
F
b
dynamic force on the output side of a vibration isolator, which results in a zero displacement output
3.5
dynamic driving point stiffness
k
1,1
frequency-dependent ratio of the complex force F on the input side of a vibration isolator with the output side
1
blocked to the complex displacement u on the input side during simple harmonic motion, defined by the
1
following formula
= F / u
k
1,1
1 1
NOTE 1 The indices “1” denote that the force and displacement are measured on the input side.
NOTE 2 The value of k can be dependent on static preload, temperature and other conditions. At low frequencies
1,1
elastic and dissipative forces solely determine k . At higher frequencies inertial forces play a role as well.
1,1
3.6
dynamic transfer stiffness
k
2,1
frequency dependent ratio of the complex blocking force F on the output side of a resilient element to the
2,b
complex displacement u on the input side during simple harmonic motion, defined by the following formula
1
= F / u
k
2,1
2,b 1
NOTE 1 The indices “1”and “2” denote the input and output sides respectively.
NOTE 2 The value of k can be dependent on static preload, temperature and other conditions. At low frequencies k
2,1 2,1
is solely determined by elastic and dissipative forces and k ≈ k . At higher frequencies inertial forces in the resilient
1,1 2,1
element play a role as well and k ≠ k .
1,1 2,1
3.7
loss factor of resilient element
η
ratio of the imaginary part of k and the real part of k , i.e. the tangent of the phase angle of k , in the low
1,1 1,1 1,1
frequency range, where inertial forces in the element are negligible
3.8
frequency-averaged dynamic transfer stiffness
k
av
function of the frequency of the average value of the dynamic transfer stiffness over a frequency band ∆f
NOTE See 8.2
3.9
point contact
contact area, which vibrates as the surface of a rigid body
3.10
normal translation
translational vibration normal to the flange of a resilient element
3.11
transverse translation
translational vibration in a direction perpendicular to that of the normal translation
© ISO 2005 – All rights reserved 3

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ISO/DIS 10846-5
3.12
linearity
property of the dynamic behaviour of a vibration isolator if it satisfies the principle of superposition
NOTE 1 The principle of superposition can be stated as follows. If an input x (t) produces an output y (t) and in a
1 1
separate test an input x (t) produces an output y (t), superposition holds if the input [ax (t) + bx (t)] produces the output
2 2 1 2
[ay (t) + by (t)]. This must hold for all values of a, b and x (t) and x (t); a and b are arbitrary constants.
1 2 1 2
NOTE 2 In practice the above test for linearity is impractical and measuring the dynamic transfer stiffness for a range of
input levels does a limited check of linearity. In effect this procedure checks for a proportional relationship between the
response and the excitation (see 7.7).
3.13
driving point method
method in which either the input displacement, velocity or acceleration and the input force are measured, with
the output side of the vibration isolator blocked
3.14
force level
L
F
defined by the following formula
2
F
= 10lg  dB
L
F
2
F
0
2 -6
where F denotes the mean square value of the force in a specific frequency band and F = 10 N is the
0
reference force
3.15
acceleration level

L
a
defined by the following formula
2
a
= 10lg  dB
La
2
a
0
2
where a denotes the mean square value of the acceleration in a specific frequency band and
-6 2
a = 10 m/s is the reference acceleration
0
3.16
level of dynamic transfer stiffness
L
k
2,1
defined by the follow
...