EN 60068-2-80:2005

Environmental testing - Part 2-80: Tests - Test Fi: Vibration - Mixed mode

Intended for general application for testing specimens when simulation is required of vibration excitation of a complex and mixed nature. The purpose of the test is to demonstrate the adequacy of the specimen to resist the specified mixed mode excitation without unacceptable degradation of its functional and/or structural performance. It is particularly useful for tailoring mixed mode environments where measured data are available for the real life environment. The test also helps reveal the accumulated effects of stress induced by random vibration, mixed with sine and/or random, and the resulting mechanical weakness and degradation in specified performances, and to use this information, in conjunction with the relevant specification, to assess the acceptability of specimens. In some cases, this standard may also be used to demonstrate the mechanical robustness of specimens. This standard is applicable to specimens which may be subjected to vibration of a random and/or a combination of random and deterministic nature resulting from transportation or real life environments, for example in aircraft, space vehicles and for items in their transportation container when the latter may be considered as part of the specimen itself. Although primarily intended for electrotechnical specimens, this standard is not restricted to such specimens and may be used in other fields where desired.

Umgebungseinflüsse - Teil 2-80: Prüfverfahren - Prüfung Fi: Mixed-Mode Vibrationsprüfung

Essais d'environnement - Partie 2-80: Essais - Essai Fi: Vibration - Mode mixte

Destinée à une application générale aux essais des spécimens lorsqu'une simulation d'excitation de vibrations complexes et mixtes est nécessaire. L'objectif de l'essai est de prouver l'adéquation du spécimen à résister aux excitations spécifiées en mode mixte sans provoquer de dégradation inacceptable de ses performances fonctionnelles et/ou structurelles. Cet essai est particulièrement utile pour adapter des environnements en mode mixte à l'environnement réel lorsque les données mesurées sont disponibles. L'essai permet également de révéler les effets accumulés des contraintes induites par les vibrations aléatoires, combinées sinus et/ou bruit, ainsi que la faiblesse et la dégradation mécaniques qui en résultent au niveau de la performance spécifiée, et d'utiliser ces informations associées aux spécifications particulières pour évaluer l'acceptabilité des spécimens. Dans certains cas, la présente norme peut également servir à prouver la robustesse mécanique des spécimens. La présente norme s'applique à des spécimens qui peuvent être soumis à des vibrations aléatoires et/ou à une combinaison de vibrations aléatoires et déterministes dues à l'environnement de transport ou à l'environnement réel, par exemple dans les avions ou les véhicules spatiaux ou dans les éléments du conteneur de transport lorsque celui-ci est considéré comme partie intégrante du spécimen. Bien qu'elle soit principalement destinée aux spécimens électrotechniques, la présente norme ne se limite pas à ces derniers et peut être utilisée dans d'autres domaines le cas échéant.

Okoljski preskusi – 2-80. del: Preskusi – Preskus Fi: vibracije – mešani način (IEC 60068-2-80:2005)

General Information

• Status: Published
• Publication Date: 06-Jul-2005
• Withdrawal Date: 31-May-2008
• ICS: 19.040 - Environmental testing
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: CLC/SR 104 - Environmental conditions, classification and methods of test
• Drafting Committee: IEC/TC 104 - IEC_TC_104
• Parallel Committee: IEC/TC 104 - IEC_TC_104
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 07-Jul-2005
• Completion Date: 07-Jul-2005
• Ref Project: SIST EN 60068-2-80:2005 - Environmental testing -- Part 2-80: Tests - Test Fi: Vibration - Mixed mode

Standards Content (Sample)

SLOVENSKI SIST EN 60068-2-80:2005

STANDARD
december 2005
Okoljski preskusi – 2-80. del: Preskusi – Preskus Fi: vibracije – mešani način
(IEC 60068-2-80:2005)
Environmental testing – Part 2-80: Tests – Test Fi: Vibration – Mixed mode (IEC
60068-2-80:2005)
ICS 19.040 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60068-2-80
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2005
ICS 19.040; 29.020
English version
Environmental testing
Part 2-80: Tests –
Test Fi: Vibration –
Mixed mode
(IEC 60068-2-80:2005)
Essais d'environnement Umgebungseinflüsse
Partie 2-80: Essais – Teil 2-80: Prüfverfahren –
Essai Fi: Vibration - Mode mixte Prüfung Fi: Mixed-Mode Vibrationsprüfung
(CEI 60068-2-80:2005) (IEC 60068-2-80:2005)

This European Standard was approved by CENELEC on 2005-06-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60068-2-80:2005 E
Foreword
The text of document 104/363/FDIS, future edition 1 of IEC 60068-2-80, prepared by IEC TC 104,
Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 60068-2-80 on 2005-06-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60068-2-80:2005 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025:2000 (not modified).
__________
- 3 - EN 60068-2-80:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-300 2001 International Electrotechnical Vocabulary - -
- Electrical and electronic measurements
and measuring instruments
Part 311: General terms relating to
measurements –
Part 312: General terms relating to
electrical measurements –
Part 313: Types of electrical measuring
instruments –
Part 314: Specific terms according to the
type of instrument
1)
IEC 60068-1 1988 Environmental testing EN 60068-1 1994
Part 1: General and guidance
IEC 60068-2-6 1995 Part 2: Tests - Test Fc: Vibration EN 60068-2-6 1995
+ corr. March 1995 (sinusoidal)

2)
IEC 60068-2-47 1999 Part 2-47: Test methods - Mounting of EN 60068-2-47 1999
components, equipment and other articles
for vibration, impact and similar dynamic
tests
IEC 60068-2-64 1993 Part 2: Test methods - Test Fh: Vibration, EN 60068-2-64 1994
+ corr. October 1993 broad-band random (digital control) and
guidance
IEC 60068-3-8 2003 Part 3-8: Supporting documentation and EN 60068-3-8 2003
guidance - Selecting amongst vibration
tests
IEC 60068-5-2 1990 Part 5: Guide to drafting of test methods - EN 60068-5-2 1999
Terms and definitions
ISO 2041 1990 Vibration and shock - Vocabulary - -

1)
EN 60068-1 includes corrigendum 1988 + A1:1992 to IEC 60068-1.
2)
EN 60068-2-47:1999 is superseded by EN 60068-2-47:2005, which is based on IEC 60068-2-47:2005.

NORME CEI
INTERNATIONALE
IEC
60068-2-80
INTERNATIONAL
Première édition
STANDARD
First edition
2005-05
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Essais d’environnement –
Partie 2-80:
Essais – Essai Fi: Vibration – Mode mixte

Environmental testing –
Part 2-80:
Tests – Test Fi: Vibration – Mixed mode

CODE PRIX
X
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

60068-2-80  IEC:2005 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11

1 Scope.13
2 Normative references .13
3 Terms and definitions .15
4 Requirements for testing .25
4.1 General .25
4.2 Control systems .25
4.3 Basic motion .25
4.4 Cross axis motion.25
4.5 Mounting .27
4.6 Measuring systems.27
5 Requirements for testing mixed mode.29
5.1 Vibration tolerances – Random.31
5.2 Vibration tolerances – Sine.37
5.3 Control strategy.39
5.4 Vibration response investigation.41
6 Severities .41
6.1 Broadband random vibration.43
6.2 Random narrowbands .43
6.3 Sine tones .45
7 Preconditioning .47
8 Initial measurements .47
9 Testing .47
9.1 General .47
9.2 Initial vibration response investigation .49
9.3 Low-level excitation for equalization prior to testing.51
9.4 Mixed mode testing .51
9.5 Final vibration response investigation.53
10 Intermediate measurements .53
11 Recovery.53
12 Final measurements .53
13 Information to be given in the relevant specification .53
14 Information to be given in the test report .55

Annex A (informative) Mixed mode general information.59
Annex B (informative) Guidance.71

Bibliography.83

60068-2-80  IEC:2005 – 5 –
Figure 1 – Boundaries for acceleration spectral density (see also 5.1.1) .29
Figure 2 – Stochastical excitation, representation of signal clipping and Gaussian
(normal) probability.31
Figure 3 – Statistical accuracy of acceleration spectral density versus degrees of
freedom for different confidence levels .33
Figure 4 – Distribution (probability density) of sine, sine-on-random and random signals .35
Figure 5 – Recommended sinusoidal sweep rate as a function of power ratio for sine
on random depending on E .47
sor
Figure A.1 – Sine at 160 Hz .63
Figure A.2 – Sine at 380 Hz .65
Figure A.3 – Auto correlation – Sine at 160 Hz .65

Table A.1 – Determination of sine wave with APD calculation .67
Table A.2 – Determination of sine wave with autocorrelation calculation .69

60068-2-80 © IEC:2005 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-80: Tests – Test Fi: Vibration – Mixed mode

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, em
...