1、IEC 60068-2-64Edition 2.0 2008-04INTERNATIONALSTANDARDNORMEINTERNATIONALEEnvironmental testing Part 2-64: Tests Test Fh: Vibration, broadband random and guidance Essais denvironnement Partie 2-64: Essais Essai Fh: Vibrations alatoires large bande et guide IEC60068-2-64:2008 INTRANORMES pour : ALSTOM
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16、ons, visitez le FAQ du Service clients ou contactez-nous:Email: csciec.chTl.: +41 22 919 02 11 Fax: +41 22 919 03 00 INTRANORMES pour : ALSTOM TRANSPORTapapaapapaapapapaapapapapaapapapapIEC 60068-2-64Edition 2.0 2008-04INTERNATIONALSTANDARDNORMEINTERNATIONALEEnvironmental testing Part 2-64: Tests Te
17、st Fh: Vibration, broadband random and guidance Essais denvironnement Partie 2-64: Essais Essai Fh: Vibrations alatoires large bande et guide INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE WICS 19.040 PRICE CODECODE PRIXISBN 2-8318-9745-9INTRANORMES pour : ALSTO
18、M TRANSPORTapapaapapaapapapaapapapapaapapapap 2 60068-2-64 IEC:2008 CONTENTS FOREWORD.4INTRODUCTION.61 Scope.72 Normative references .73 Terms and definitions .84 Requirements for test apparatus.124.1 General .124.2 Basic motion .124.3 Cross-axis motion .134.4 Mounting .134.5 Measuring systems.134.6
19、 Vibration tolerances .144.7 Control strategy.174.8 Vibration response investigation.175 Severities .185.1 Test frequency range .185.2 RMS value of acceleration .185.3 Shape of acceleration spectral density curve.185.4 Test duration .196 Preconditioning .197 Initial measurements and functional perfo
20、rmance test .198 Testing .198.1 General .198.2 Initial vibration response investigation.208.3 Low-level excitation for equalization prior to testing.208.4 Random testing .218.5 Final vibration response investigation.219 Recovery.2110 Final measurements and functional performance.2111 Information to
21、be given in the relevant specification .2212 Information to be given in the test report .22Annex A (informative) Standardized test spectra.24Annex B (informative) Guidance.30Bibliography.34Figure 1 Tolerance bands for acceleration spectral density; initial and final slope (see B.2.3).14Figure 2 Time
22、 history of stochastically excitation; probability density function with Gaussian (normal) distribution (Example with crest factor = 3, see also 3.14 and 4.6.2) .15Figure 3 Statistical accuracy of acceleration spectral density versus degrees of freedom for different confidence levels (see also 4.6.3
23、) .16INTRANORMES pour : ALSTOM TRANSPORTapapaapapaapapapaapapapapaapapapap60068-2-64 IEC:2008 3 Table A.1 Categories for spectrum: transportation .24Table A.2 Break points for spectrum: transportation.25Table A.3 Categories for spectrum: stationary installation.25Table A.4 Break points for spectrum:
24、 stationary installation .26Table A.5 Categories for spectrum: equipment in wheeled vehicles .27Table A.6 Break points for spectrum: equipment in wheeled vehicles.28Table A.7 Categories for spectrum: equipment in airplanes and helicopters .29Table A.8 Break points for spectrum: equipment in airplane
25、s and helicopters .29INTRANORMES pour : ALSTOM TRANSPORTapapaapapaapapapaapapapapaapapapap 4 60068-2-64 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ENVIRONMENTAL TESTING Part 2-64: Tests Test Fh: Vibration, broadband random and guidance FOREWORD 1) The International Electrotechnical Commiss
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36、 rights. International Standard IEC 60068-2-64 has been prepared by IEC technical committee 104: Environmental conditions, classification and methods of test. This second edition cancels and replaces the first edition, published in 1993, and constitutes a technical revision. The major changes with r
37、egard to the previous edition concern the removal of Method 1 and Method 2, replaced by a single method, and replacement of Annex A with suggested test spectra and removal of Annex C. Also included in this revision is the testing of soft packed specimens. INTRANORMES pour : ALSTOM TRANSPORTapapaapapaapapapaapapapapaapapapap6
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