1、BRITISH STANDARDBS EN 60068-2-6:2008Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal)ICS 19.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g4
2、3g55g3g47g36g58BS EN 60068-2-6:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008ISBN 978 0 580 56402 4National forewordThis British Standard is the UK implementation of EN 60068-2-6:2008. It is identical to IEC 60068-
3、2-6:2007. It supersedes BS EN 60068-2-6:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/104, Environmental conditions, classification and testing.A list of organizations represented on this committee can be obtained on request to its secretary
4、.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD E
5、N 60068-2-6 NORME EUROPENNE EUROPISCHE NORM February 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rig
6、hts of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-6:2008 E ICS 19.040 Supersedes EN 60068-2-6:1995English version Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) (IEC 60068-2-6:2007) Essais denvironnement - Partie 2
7、-6: Essais - Essai Fc: Vibrations (sinusodales) (CEI 60068-2-6:2007) Umgebungseinflsse - Teil 2-6: Prfverfahren - Prfung Fc: Schwingen (sinusfrmig) (IEC 60068-2-6:2007) This European Standard was approved by CENELEC on 2008-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Reg
8、ulations 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. T
9、his 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 memb
10、ers are the national electrotechnical committees of Austria, Belgium, Bulgaria, 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, Sloven
11、ia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60068-2-6:2008 2 Foreword The text of document 104/439/FDIS, future edition 7 of IEC 60068-2-6, prepared by IEC TC 104, Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC parallel vote and was ap
12、proved by CENELEC as EN 60068-2-6 on 2008-02-01. This European Standard supersedes EN 60068-2-6:1995. The major changes with regard to EN 60068-2-6:1995 concern: the agreed wording from IEC technical committee 104 meeting held in Stockholm:2000 on the testing of soft packages; reference to the lates
13、t version of EN 60068-2-47: Mounting; simplification of the layout of the standard by replacing some tables with text; addition of the test report requirements (see Clause 13). The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an id
14、entical national standard or by endorsement (dop) 2008-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60068-2-6:2007 was approved by CE
15、NELEC as a European Standard without any modification. _ CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Terms and definitions .6 4 Requirements for testing.9 4.1 Required characteristics 9 4.1.1 Basic motion9 4.1.2 Spurious motion.9 4.1.3 Signal tolerance.10 4.1.4 Vibration amplitude to
16、lerances .10 4.1.5 Frequency tolerances.10 4.1.6 Sweep .11 4.2 Control strategy.11 4.2.1 Single/multipoint control.11 4.2.2 Multi-reference control .12 4.3 Mounting .12 5 Severities .12 5.1 Frequency range13 5.1.1 Lower frequency f1Hz .13 5.1.2 Upper frequency f2Hz .13 5.2 Vibration amplitude13 5.3
17、Duration of endurance .16 5.3.1 Endurance by sweeping .16 5.3.2 Endurance at fixed frequencies 17 6 Preconditioning.17 7 Initial measurements.17 8 Testing .17 8.1 General .17 8.2 Vibration response investigation.18 8.3 Endurance procedures.18 8.3.1 Endurance by sweeping .18 8.3.2 Endurance at fixed
18、frequencies 18 9 Intermediate measurements19 10 Recovery 19 11 Final measurements .19 12 Information to be given in the relevant specification.19 13 Information to be given in the test report .20 Annex A (informative) Guide to test Fc .22 Annex B (informative) Examples of severities primarily intend
19、ed for components 35 Annex C (informative) Examples of severities primarily intended for equipment.36 Bibliography38 Annex ZA (normative) Normative references to international publications with their corresponding European publications 39 3 BS EN 60068-2-6:2008Figure 1 Nomogram relating vibration am
20、plitude to frequency with lower cross-over frequency (8 Hz to 10 Hz)14 Figure 2 Nomogram relating vibration amplitude to frequency with higher cross-over frequency (58 Hz to 62 Hz)15 Figure 3 Nomogram relating vibration displacement amplitude to frequency (only applicable for frequency ranges with a
21、n upper frequency of 10 Hz) 16 Figure A.1 Generalized transmissibility factors for vibration isolators.32 Table A.1 Number of sweep cycles and associated endurance times per axis .29 Table A.2 CB response time.30 Table A.3 CPB response time.31 Table B.1 Endurance by sweeping Examples with higher cro
22、ss-over frequency 35 Table C.1 Endurance by sweeping Examples with lower cross-over frequency .36 Table C.2 Endurance by sweeping Examples with higher cross-over frequency 37 4 BS EN 60068-2-6:2008INTRODUCTION This part of IEC 60068 gives a method of test applicable to components, equipment and othe
23、r articles which, during transportation or in service, may be subjected to conditions involving vibration of a harmonic pattern, generated primarily by rotating, pulsating or oscillating forces, such as occur in ships, aircraft, land vehicles, rotorcraft and space applications or are caused by machi
24、nery and seismic phenomena. This standard consists basically of subjecting a specimen to sinusoidal vibration over a given frequency range or at discrete frequencies, for a given period of time. A vibration response investigation may be specified which aims at determining critical frequencies of the
25、 specimen. The relevant specification shall indicate whether the specimen shall function during vibration or whether it suffices that it still works after having been submitted to vibration. It is emphasized that vibration testing always demands a certain degree of engineering judgement, and both th
26、e supplier and purchaser should be fully aware of this fact. However, sinusoidal testing is deterministic and, therefore, relatively simple to perform. Thus it is readily applicable to both diagnostic and service life testing. The main part of this standard deals primarily with the methods of contro
27、lling the test at specified points using either analogue or digital techniques, and gives, in detail, the testing procedure. The requirements for the vibration motion, choice of severities including frequency ranges, amplitudes and endurance times are also specified, these severities representing a
28、rationalized series of parameters. The relevant specification writer is expected to choose the testing procedure and values appropriate to the specimen and its use. Certain terms have been defined to facilitate a proper understanding of the text. These definitions are given in Clause 3. Annex A give
29、s general guidance for the test and Annexes B and C provide guidance on the selection of severities for components and equipment. 5 BS EN 60068-2-6:2008ENVIRONMENTAL TESTING Part 2: Tests Test Fc: Vibration (sinusoidal) 1 Scope This part of IEC 60068 gives a method of test which provides a standard
30、procedure to determine the ability of components, equipment and other articles, hereinafter referred to as specimens, to withstand specified severities of sinusoidal vibration. If an item is to be tested in an unpackaged form, that is without its packaging, it is referred to as a test specimen. Howe
31、ver, 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. The purpose of this test is to determine any mechanical weakness and/or degradation in the specified performance of specimens and to use this info
32、rmation, in conjunction with the relevant specification, to decide upon the acceptability of the specimens. In some cases, the test method may also be used to demonstrate the mechanical robustness of specimens and/or to study their dynamic behaviour. Categorization of components can also be made on
33、the basis of a selection from within the severities quoted in the test. 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
34、 document (including any amendments) applies. IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-47, Environmental testing Part 2-47: Tests Mounting of specimens for vibration, impact and similar dynamic tests IEC 60721-3 (all parts), Classification of environmental conditio
35、ns Part 3: Classification of groups of environmental parameters and their severities ISO 2041, Vibration and shock Vocabulary ISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratories 3 Terms and definitions For the purposes of this document, the following t
36、erms and definitions apply. NOTE 1 The terms used are generally taken from ISO 2041 and IEC 60068-1. However, “sweep cycle” (3.4) and “signal tolerance” (3.5) have specific meanings in this standard. Definitions in alphabetical order: Actual motion 3.7 Basic motion 3.6 Centred resonance frequency 3.
37、10 Check point 3.2.1 6 BS EN 60068-2-6:2008Critical frequencies 3.9 Damping 3.8 Fictitious reference point 3.2.3 Fixing point 3.1 gn 3.12 Measuring points 3.2 Multipoint control 3.3.2 Reference point 3.2.2 Restricted frequency sweeping 3.11 Signal tolerance 3.5 Single point control 3.3.1 Sweep cycle
38、 3.4 NOTE 2 Terms described below are either not identical to, or not defined in ISO 2041 or in IEC 60068-1. 3.1 fixing point part of the specimen in contact with the fixture or vibration table at a point where the specimen is normally fastened in service NOTE 1 If a part of the real mounting struct
39、ure is used as the fixture, the fixing points are those of the mounting structure and not of the specimen. NOTE 2 Where the specimen consists of a packaged product, fixing point may be interpreted as the surface of the specimen which is in contact with the vibration table. 3.2 measuring points speci
40、fic points at which data are gathered conducting the test NOTE 1 These are of two main types, the definitions of which are given below. NOTE 2 Measurements may be made at points within the specimen in order to assess its behaviour, but these are not considered as measuring points in the sense of thi
41、s standard. For further details, see A.2.1. 3.2.1 check point point located on the fixture, on the vibration table or on the specimen as close as possible to one of its fixing points, and in any case rigidly connected to it NOTE 1 A number of check points are used as a means of ensuring that the tes
42、t requirements are satisfied. NOTE 2 If four or fewer fixing points exist, each is used as a check point. For packaged products, where a fixing point may be interpreted as the packaging surface in contact with the vibration table, one check point may be used, provided that there are no effects due t
43、o resonances of the vibration table or the mounting structure in the frequency range specified for the test. If this is the case, multipoint control may be necessary, but see also Note 3. If more than four fixing points exist, four representative fixing points will be defined in the relevant specifi
44、cation to be used as check points. NOTE 3 In special cases, for example for large or complex specimens, the check points will be prescribed in the relevant specification if not close to the fixing points. NOTE 4 Where a large number of small specimens are mounted on one fixture, or in the case of a
45、small specimen where there are several fixing points, a single check point (i.e. the reference point) may be selected for the derivation of the control signal. This signal is then related to the fixture rather than to the fixing points of the specimen(s). This is only valid when the lowest resonance
46、 frequency of the loaded fixture is well above the upper frequency of the test. 7 BS EN 60068-2-6:20083.2.2 reference point point, chosen from the check points, whose signal is used to control the test, so that the requirements of this standard are satisfied 3.2.3 fictitious reference point point, d
47、erived from multiple check points, either manually or automatically, the result of which is used to control the test, so that the requirements of this standard are satisfied 3.3 control methods 3.3.1 single point control control method using the signal from the transducer at the reference point in o
48、rder to maintain this point at the specified vibration level (see 4.1.4.1) 3.3.2 multipoint control control method achieved by using the signals from each of the transducers at the check points NOTE The signals are either continuously averaged arithmetically or processed by using comparison techniqu
49、es, depending upon the relevant specification (see 4.1.4.1) 3.4 sweep cycle traverse of the specified frequency range once in each direction, for example 10 Hz to 150 Hz to 10 Hz NOTE Manufacturers handbooks for digital sine control systems often refer to a sweep cycle as f1to f2, and not f1to f2to f1. 3.5 signal tolerance signal tolerance T = NFF1 100 % where NF is the r.m.s value of the unfiltered signal; F is the r.m.s value of the filtered signal. NOTE This parameter applies
