EN 60068-2-57-2013 en Environmental testing - Part 2-57 Tests - Test Ff Vibration - Time-history and sine-beat method.pdf

1、BSI Standards PublicationEnvironmental testingPart 2-57: Tests Test Ff: Vibration Time-history and sine-beat methodBS EN 60068-2-57:2013National forewordThis British Standard is the UK implementation of EN 60068-2-57:2013. It isidentical to IEC 60068-2-57:2013. It supersedes BS EN 60068-2-57:2000 an

2、dBS EN 60068-2-59:1993, which will be withdrawn on 30 May 2016.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/104, Environmental conditions, classification and testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.Th

3、is publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013ISBN 978 0 580 70472 7ICS 19.040Compliance with a British Standard cannot confer immu

4、nity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2013.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60068-2-57:2013EUROPEAN STANDARD EN 60068-2-57 NORME EUROPENNE EURO

5、PISCHE NORM August 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by

6、 any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-57:2013 E ICS 19.040 Supersedes EN 60068-2-57:2000, EN 60068-2-59:1993 English version Environmental testing - Part 2-57: Tests - Test Ff: Vibration - Time-history and sine-beat method (IEC 60068-2-57:2013) Essais denvironnement

7、- Partie 2-57: Essais - Essai Ff: Vibrations - Mthode par acclrogrammes et sinusodes modules (CEI 60068-2-57:2013) Umgebungseinflsse - Teil 2-57: Prfungen - Prfung Ff: Schwingen - Zeitlaufverfahren und Sinusimpulse (IEC 60068-2-57:2013) This European Standard was approved by CENELEC on 2013-05-30. C

8、ENELEC 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 o

9、n application to the CEN-CENELEC Management Centre 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

10、CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hung

11、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60068-2-57:2013EN 60068-2-57:2013 - 2 - Foreword The text of document 104/595/FDIS, future edit

12、ion 3 of IEC 60068-2-57, prepared by IEC TC 104 “Environmental conditions, classification and methods of test“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60068-2-57:2013. The following dates are fixed: latest date by which the document has to be implemented at natio

13、nal level by publication of an identical national standard or by endorsement (dop) 2014-02-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-05-30 This document supersedes EN 60068-2-57:2000 and EN 60068-2-59:1993. EN 60068-2-57:2013 include

14、s the following significant technical changes with respect to EN 60068-2-57:2000 and EN 60068-2-59:1993: editorially combines EN 60068-2-57 and EN 60068-2-59; the title has been modified to include a sine beat method. Attention is drawn to the possibility that some of the elements of this document m

15、ay be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60068-2-57:2013 was approved by CENELEC as a European Standard without any modification. In the official v

16、ersion, for Bibliography, the following notes have to be added for the standards indicated: IEC 60068-2-59:1990 NOTE Harmonised as EN 60068-2-59:1993 (not modified). IEC 60068-2-81 NOTE Harmonised as EN 60068-2-81. ISO/IEC 17025 NOTE Harmonised as EN ISO/IEC 17025. BS EN 60068-2-57:2013- 3 - EN 6006

17、8-2-57:2013 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the editi

18、on 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. Publication Year Title EN/HD Year IEC 60068 Se

19、ries Environmental testing EN 60068 Series IEC 60068-1 - Environmental testing - Part 1: General and guidance EN 60068-1 - IEC 60068-2-6 2007 Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 2008 IEC 60068-2-47 2005 Environmental testing - Part 2-47: Tests - Mou

20、nting of specimens for vibration, impact and similar dynamic tests EN 60068-2-47 2005 IEC 60068-2-64 2008 Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance EN 60068-2-64 2008 IEC 60068-3-3 1991 Environmental testing - Part 3: Guidance - Seismic test methods

21、 for equipments EN 60068-3-3 1993 IEC 60068-3-8 - Environmental testing - Part 3-8: Supporting documentation and guidance - Selecting amongst vibration tests EN 60068-3-8 - BS EN 60068-2-57:2013 2 60068-2-57 IEC:2013 CONTENTS INTRODUCTION . 6 1 Scope . 8 2 Normative references . 8 3 Terms and defini

22、tions . 8 4 Test requirements and associated parameters 15 4.1 General . 15 4.2 Requirements for testing . 15 4.3 Vibration response investigation 16 4.3.1 General . 16 4.3.2 Basic motion 16 4.3.3 Transverse motion . 16 4.3.4 Rotational motion 16 4.3.5 Measuring points . 16 4.3.6 Vibration amplitude

23、 tolerances . 17 4.3.7 Frequency tolerances 17 4.3.8 Sweeping 17 4.3.9 Damping ratio 17 4.4 Time-history testing . 18 4.4.1 Basic motion 18 4.4.2 Transverse motion . 18 4.4.3 Rotational motion 18 4.4.4 Tolerance zone for the required response spectrum 18 4.4.5 Frequency range . 19 4.5 Sine-beat test

24、ing . 19 4.5.1 General description . 19 4.5.2 Vibration amplitude tolerances . 19 4.5.3 Test frequency tolerances . 19 4.5.4 Transverse motion . 19 4.6 Mounting . 20 5 Severities . 20 5.1 General . 20 5.2 Time history 20 5.3 Test frequency range. 21 5.4 Required response spectrum . 21 5.5 Number and

25、 duration of time-histories . 21 5.5.1 Number of time histories 21 5.5.2 Time-history duration . 21 5.5.3 Duration of the strong part of the time history 22 5.5.4 Number of high stress cycles . 22 5.6 Sine-beat test level 23 5.6.1 General . 23 5.6.2 Test frequency determination 29 5.6.3 Sine-beat te

26、st wave . 29 5.6.4 Number of cycles in the sine beat 29 5.6.5 Modulating frequency 30 BS EN 60068-2-57:201360068-2-57 IEC:2013 3 5.6.6 Number of sine beats. 31 5.6.7 High-stress low-cycle fatigue effects 31 6 Preconditioning 31 7 Initial measurements 31 8 Testing . 31 8.1 General . 31 8.2 Vibration

27、response investigation 31 8.3 Time-history testing . 32 8.4 Sine-beat testing . 32 8.5 Multi-axis testing . 32 8.5.1 General . 32 8.5.2 Single axis testing . 32 8.5.3 Biaxial testing 32 8.5.4 Triaxial testing . 32 9 Intermediate measurements . 33 10 Recovery 33 11 Final measurements . 33 12 Informat

28、ion to be given in the relevant specification 33 13 Information to be given in the test report 34 Annex A (informative) Guidance for time-history and sine-beat methods 35 Bibliography 41 Figure 1 Sequence of five sine beats with five cycles . 7 Figure 2 Number of cycles per sine beat 13 Figure 3 Typ

29、ical time history 14 Figure 4 Typical logarithmic plot of a required response spectrum, test response spectrum and tolerance zone 14 Figure 5 Typical response of an oscillator excited by a specific time history during a test . 22 Figure 6 Recommended test level with crossover frequency at 0,8 Hz . 2

30、4 Figure 7 Recommended test level with crossover frequency at 1,6 Hz . 26 Figure 8 Recommended test level with crossover frequency at 8 Hz 28 Figure 9 Amplification factors of different sine beats, continuous sine and a typical natural time-history . 30 Figure A.1 Recommended shape of a required res

31、ponse spectrum in generalized form 37 Figure A.2 Standardized presentation of matched sine beats of acceleration, velocity and displacement (five cycles within the sine beat of acceleration) . 40 Table 1 Comparison of tolerances 15 Table 2 Recommended test frequency ranges 21 Table 3 Recommended tes

32、t levels with a crossover frequency of 0,8 Hz (see Figure 6) . 23 Table 4 Recommended test levels with a crossover frequency of 1,6 Hz (see Figure 7) . 25 Table 5 Recommended test levels with a crossover frequency of 8 Hz (see Figure 8) 27 BS EN 60068-2-57:2013 6 60068-2-57 IEC:2013 INTRODUCTION Thi

33、s part of IEC 60068 details methods for testing components, equipment and other electrotechnical products (hereinafter referred to as “specimens”) which in service can be subjected to random or oscillating type dynamic forces of short duration, typical examples of which are the stresses induced in e

34、quipment as a result of earthquakes, explosions and certain phases of transportation, or by transient, short time vibration in machinery. The characteristics of these forces and the damping of the specimen may be such that the vibration response of the specimen will not reach a steady-state conditio

35、n. The time-history test consists, after any preliminary vibration response investigation with sinusoidal or random vibration, in subjecting the specimen to a vibration (acceleration, velocity or displacement) the time history being specified by a response spectrum with characteristics simulating th

36、e effects of the dynamic forces. A time history may be developed or obtained from a natural event (natural time history), a random sample a synthesized signal artificial time history. In general, to adapt to the required testing severity, some modification is necessary. The use of a time history all

37、ows a single test wave to envelop a broadband response spectrum. It is possible for all the modes of the structure in the excitation axis (or axes) to be excited at the same time and consequently the stresses derived from the combined effects of the coupled modes are generally taken into account. In

38、 the sine beat test, the specimen is excited at fixed frequencies with a preset number of sine beats (see Figure 1). These fixed test frequencies are predetermined test frequencies, or critical frequencies identified by means of a sinusoidal vibration test (IEC 60068-2-6), or both. Pauses are provid

39、ed between the individual sine beats in order to allow decay of the free response of the specimen. In Clause 12 specification writers will find a list of details to be considered for inclusion in specifications and, in Annex A, guidance giving necessary extra information. BS EN 60068-2-57:201360068-

40、2-57 IEC:2013 7 1stsine beat2ndsine beatPause3rdsinebeatPausePause5thsine beatPause4thsine beatTimeFive cyclesfTestfrequency1fModulating frequencyVibration amplitude IEC907/13Figure1Sequenceoffivesinebeats withfive cyclesBS EN 60068-2-57:2013 8 60068-2-57 IEC:2013 ENVIRONMENTAL TESTING Part 2-57: Te

41、sts Test Ff: Vibration Time-history and sine-beat method 1 Scope This part of IEC 60068 provides a standard procedure for determining, by the time-history and sine-beat methods, the ability of a specimen to withstand specified severities of transient vibration. 2 Normative references The following d

42、ocuments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068 (all parts),

43、 Environmental testing IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-6:2007, 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

44、 tests IEC 60068-2-64:2008, Environmental testing Part 2-64: Tests Vibration, broadband random and guidance IEC 60068-3-3:1991, Environmental testing Part 3: Guidance Seismic test methods for equipments IEC 60068-3-8, Environmental testing Part 3-8: Supporting documentation and guidance Selecting am

45、ongst vibration tests 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE Some of the following terms can be found in ISO 2041, IEC 60068-1 or in IEC 60068-2-6. Where, for the convenience of the reader, a definition from one of those sources is

46、included here, it is indicated. 3.1 critical frequency frequency at which malfunctioning and/or deterioration of performance of the specimen which are dependent on vibration are exhibited, and/or mechanical resonances and/or other response effects occur, for example chatter SOURCE: IEC 60068-2-6:200

47、7, definition 3.9 BS EN 60068-2-57:201360068-2-57 IEC:2013 9 3.2 crossover frequency frequency at which the characteristic of a vibration changes from one relationship to another Note 1 to entry: For example, a crossover frequency may be that frequency at which the test vibration amplitude changes f

48、rom a constant displacement value versus frequency to a constant acceleration value versus frequency. SOURCE: ISO 2041:2007, definition 2.118 3.3 damping progressive reduction of the amplitude with time due to the dissipation of energy in a system Note 1 to entry: In practice, damping depends on man

49、y parameters, such as the structural system, mode of vibration, strain, applied forces, velocity, materials, joint slippage, etc. SOURCE: IEC 60068-2-6:2007, definition 3.8, modified original text reads “generic term ascribed to the numerous energy dissipation mechanisms in a system“; Note remains same 3.4 viscous damping damping that occurs when an element or a part of a vibration system is resisted by a force the magnit