BS EN 60068-2-64-2008 Environmental testing –– nPart 2-64 Tests – Test Fh nVibration broadband random nand guidance《环境测试 试验 试验Fh 宽带随机振动和指南》.pdf

1、Environmental testing Part 2-64: Tests Test Fh:Vibration, broadband randomand guidanceBS EN 60068-2-64: 2008raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, U

2、ncontrolled Copy, (c) BSINational forewordThis British Standard is the UK implementation of EN 60068-2-64:2008. Itis identical to IEC 60068-2-64:2008. It supersedes BS EN 60068-2 64:1995which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/104, Environmen

3、tal conditions, classification and testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. BSI 2009ISBN 978 0 58

4、0 55878 8ICS 19.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60068-2-64:2

5、008-2 2009February8Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60068-2-64 NORME EUROPENNE EUROPISCHE NORM September 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrot

6、echnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-64:2008 E ICS 19.040 Supersedes EN 60068-2-64:1994En

7、glish version Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance (IEC 60068-2-64:2008) Essais denvironnement - Partie 2-64: Essais - Essai Fh: Vibrations alatoires large bande et guide (CEI 60068-2-64:2008) Umgebungseinflsse - Teil 2-64: Prfverfahren - Prfun

8、g Fh: Schwingen, Breitbandrauschen (digital geregelt) und Leitfaden (IEC 60068-2-64:2008) This European Standard was approved by CENELEC on 2008-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the s

9、tatus 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, Germa

10、n). 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, Bulgaria,

11、 Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60068-2-64:2008Lic

12、ensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSIEN 60068-2-64:2008 - 2 - Foreword The text of document 104/456/FDIS, future edition 2 of IEC 60068-2-64, prepared by IEC TC 104, Environmental conditions, classification and methods of test, was submitted

13、 to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60068-2-64 on 2008-07-01. This European Standard supersedes EN 60068-2-64:1994. The major changes with regard to EN 60068-2-64:1994 concern the removal of Method 1 and Method 2, replaced by a single method, and replacement of Annex

14、A with suggested test spectra and removal of Annex C. Also included in this revision is the testing of soft packed specimens. 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) 2

15、009-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-07-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60068-2-64:2008 was approved by CENELEC as a European Standard without any modificat

16、ion. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 61373 NOTE Harmonized as EN 61373:1999 (not modified). ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025:2005 (not modified). _ BS EN 60068-2-64:2008Licensed Copy: Wang Bin, ISO/EXCH

17、ANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSI- 3 - EN 60068-2-64:2008 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.

18、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publicati

19、on Year Title EN/HD Year IEC 60050-300 - 1)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 mea

20、suring instruments - Part 314: Specific terms according to the type of instrument - - IEC 60068-1 -1)Environmental testing - Part 1: General and guidance EN 60068-119942)IEC 60068-2-6 -1)Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 20082)IEC 60068-2-47 2005

21、Environmental testing - Part 2-47: Tests - Mounting of specimens for vibration, impact and similar dynamic tests EN 60068-2-47 2005 IEC 60068-3-8 2003 Environmental testing - Part 3-8: Supporting documentation and guidance - Selecting amongst vibration tests EN 60068-3-8 2003 IEC 60068-5-2 -1)Enviro

22、nmental testing - Part 5: Guide to drafting of test methods - Terms and definitions EN 60068-5-2 19992)IEC 60721-3 Series Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities EN 60721-3 Series IEC Guide 104 -1)The preparation

23、of safety publications and the use of basic safety publications and group safety publications - - ISO 2041 -1)Vibration and shock - Vocabulary - - 1)Undated reference. 2)Valid edition at date of issue. BS EN 60068-2-64:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Unco

24、ntrolled Copy, (c) BSI 2 60068-2-64 IEC:2008 CONTENTS INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Terms and definitions .8 4 Requirements for test apparatus.12 4.1 General .12 4.2 Basic motion .12 4.3 Cross-axis motion .13 4.4 Mounting .13 4.5 Measuring systems13 4.6 Vibration tolerances 14

25、 4.7 Control strategy.17 4.8 Vibration response investigation17 5 Severities .18 5.1 Test frequency range 18 5.2 RMS value of acceleration .18 5.3 Shape of acceleration spectral density curve.18 5.4 Test duration .19 6 Preconditioning 19 7 Initial measurements and functional performance test 19 8 Te

26、sting .19 8.1 General .19 8.2 Initial vibration response investigation.20 8.3 Low-level excitation for equalization prior to testing.20 8.4 Random testing .21 8.5 Final vibration response investigation21 9 Recovery21 10 Final measurements and functional performance21 11 Information to be given in th

27、e relevant specification .22 12 Information to be given in the test report 22 Annex A (informative) Standardized test spectra24 Annex B (informative) Guidance.30 Bibliography34 Figure 1 Tolerance bands for acceleration spectral density; initial and final slope (see B.2.3)14 Figure 2 Time history of

28、stochastically excitation; probability density function with Gaussian (normal) distribution (Example with crest factor = 3, see also 3.14 and 4.6.2) .15 Figure 3 Statistical accuracy of acceleration spectral density versus degrees of freedom for different confidence levels (see also 4.6.3) 16 BS EN

29、60068-2-64:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSI60068-2-64 IEC:2008 3 Table A.1 Categories for spectrum: transportation .24 Table A.2 Break points for spectrum: transportation.25 Table A.3 Categories for spectrum: stationary installat

30、ion25 Table A.4 Break points for spectrum: stationary installation .26 Table A.5 Categories for spectrum: equipment in wheeled vehicles .27 Table A.6 Break points for spectrum: equipment in wheeled vehicles.28 Table A.7 Categories for spectrum: equipment in airplanes and helicopters .29 Table A.8 Br

31、eak points for spectrum: equipment in airplanes and helicopters 29 BS EN 60068-2-64:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSI 6 60068-2-64 IEC:2008 INTRODUCTION This part of IEC 60068 deals with broadband random vibration testing intended

32、 for general application to components, equipment and other products, hereinafter referred to as ”specimens”, that may be subjected to vibrations of a stochastic nature. The methods and techniques in this standard are based on digital control of random vibration. It permits the introduction of varia

33、tions to suit individual cases if these are prescribed by the relevant specification. Compared with most other tests, test Fh is not based on deterministic but on statistical techniques. Broad-band random vibration testing is therefore described in terms of probability and statistical averages. It i

34、s emphasized that random testing always demands a certain degree of engineering judgement, and both supplier and purchaser should be fully aware of this fact. The writer of the relevant specification is expected to select the testing procedure and the values of severity appropriate to the specimen a

35、nd its use. The test method is based primarily on the use of an electrodynamic or a servo-hydraulic vibration generator with an associated computer based control system used as a vibration testing system. Annexes A and B are informative annexes giving examples of test spectra for different environme

36、ntal conditions, a list of details to be considered for inclusion in specifications and guidance. BS EN 60068-2-64:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSI60068-2-64 IEC:2008 7 ENVIRONMENTAL TESTING Part 2-64: Tests-Test Fh: Vibration, b

37、roadband random and guidance 1 Scope This part of IEC 60068 demonstrates the adequacy of specimens to resist dynamic loads without unacceptable degradation of its functional and/or structural integrity when subjected to the specified random vibration test requirements. Broadband random vibration may

38、 be used to identify accumulated stress effects and the resulting mechanical weakness and degradation in the specified performance. This information, in conjunction with the relevant specification, may be used to assess the acceptability of specimens. This standard is applicable to specimens which m

39、ay be subjected to vibration of a stochastic nature resulting from transportation or operational environments, for example in aircraft, space vehicles and land vehicles. It is primarily intended for unpackaged specimens, and for items in their transportation container when the latter may be consider

40、ed as part of the specimen itself. However, if the item is packaged, then the item itself is referred to as a product and the item and its packaging together are referred to as a test specimen. This standard may be used in conjunction with IEC 60068-2-47:2005, for testing packaged products. If the s

41、pecimens are subjected to vibration of 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, testing with pure random may not be sufficient. See IEC 60068-3-8:

42、2003 for estimating the dynamic vibration environment of the specimen and based on that, selecting the appropriate test method. Although primarily intended for electrotechnical specimens, this standard is not restricted to them and may be used in other fields where desired (see Annex A). 2 Normative

43、 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. IEC 60050-300: International Electrot

44、echnical 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 inst

45、rument IEC 60068-1: Environmental testing Part 1: General and guidance IEC 60068-2-6: Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-47:2005, Environmental testing Part 2-47: Tests Mounting of specimens for vibration, impact and similar dynamic tests BS EN 60068-2-

46、64:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/06/2009 08:04, Uncontrolled Copy, (c) BSI 8 60068-2-64 IEC:2008 IEC 60068-3-8:2003, Environmental testing Part 3-8: Supporting documentation and guidance Selecting amongst vibration tests IEC 60068-5-2: Environmental testing Part 5-2:

47、Guide to drafting of test methods Terms and definitions IEC 60721-3 (all parts), Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities IEC Guide 104, The preparation of safety publications and the use of basic safety publications

48、 and group safety publications ISO 2041: Vibration and shock Vocabulary 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE The terms used are generally defined in IEC 60050-300, IEC 60068-1, IEC 60068-2-6, and IEC 60068-5-2 and ISO 2041. If a d

49、efinition from one of those sources is included here, the derivation is indicated and departures from the definitions in those sources are also indicated. 3.1 cross-axis motion motion not in the direction of the stimulus; generally specified in the two axes orthogonal to the direction of the stimulus NOTE The cross-axis motion should be measured close to the fixing points. 3.2 actual motion motion represented by the wideband signal returned from th