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Environmental testing Tests - Test Ff: Vibration - Time-history method
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Available format(s): Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users
Withdrawn date: 30-01-2019
Language(s): English
Published date: 01-01-2003
Publisher: Standards Australia
1 - AS 60068.2.57-2003 ENVIRONMENTAL TESTING - TESTS-TEST Ff: VIBRATION-TIME-HISTORY METHOD4 - PREFACE5 - CONTENTS7 - INTRODUCTION9 - 1 Scope and object9 - 2 Normative references9 - 3 Definitions10 - 3.1 critical frequency10 - 3.2 damping10 - 3.3 critical damping10 - 3.4 damping ratio10 - 3.5 signal tolerance10 - 3.6 fixing point10 - 3.7 Gn10 - 3.8 high peaks of the response11 - 3.9 measuring points11 - 3.9.1 check point11 - 3.9.2 reference point11 - 3.10 natural frequency11 - 3.11 natural time-history11 - 3.12 oscillator11 - 3.13 pause11 - 3.14 preferred testing axes12 - 3.15 random motion sample12 - 3.16 required response spectrum12 - 3.17 response spectrum12 - 3.18 sampling frequency12 - 3.19 strong part of the required response spectrum12 - 3.20 strong part of the time-history12 - 3.21 sweep cycle12 - 3.22 synthesized time-history12 - 3.23 test level12 - 3.24 test response spectrum12 - 3.25 time-history13 - 3.26 zero period acceleration13 - 4 General requirements13 - 5 Requirements for testing13 - 5.1 Vibration response investigation13 - 5.1.1 Basic motion13 - 5.1.2 Spurious motion14 - 5.1.3 Signal tolerance14 - 5.1.4 Vibration amplitude tolerances15 - 5.1.5 Frequency tolerances15 - 5.1.6 Sweeping15 - 5.1.7 Damping ratio15 - 5.2 Time- history testing15 - 5.2.1 Basic motion16 - 5.2.2 Transverse motion16 - 5.2.3 Rotational motion16 - 5.2.4 Tolerance zone for the required response spectrum16 - 5.2.5 Frequency range16 - 5.2.6 Calculation of the test response spectrum17 - 5.3 Mounting17 - 6 Severities18 - 6.1 Test frequency range18 - 6.2 Required response spectrum18 - 6.3 Number and duration of time-histories18 - 6.3.1 Number of time-histories19 - 6.3.2 Time-history duration19 - 6.3.3 Duration of the strong part of the time-history19 - 6.4 Number of high peaks of the response19 - 7 Preconditioning19 - 8 Initial measurements20 - 9 Testing20 - 9.1 General20 - 9.2 Vibration response investigation20 - 9.3 Time-history testing21 - 9.3.1 Single axis testing21 - 9.3.2 Biaxial testing21 - 9.3.3 Triaxial testing21 - 10 Intermediate measurements21 - 11 Recovery21 - 12 Final measurements22 - 13 Information to be given in the relevant specification29 - Annex A - Synthesis of the artificial time- history: Guidance29 - A.1 Introduction30 - A.2 Recommendations for obtaining a required response spectrum (see 6.2)31 - A.3 Number of high peaks of the response (see 6.4)33 - Annex B - Test frequency ranges
Provides a standard procedure for determining, by the time-history method, the ability of a specimen to withstand specified severities of transient vibration.
This part of IEC 60068 aims to provide a standard procedure for determining, by the time-historymethod, the ability of a specimen to withstand specified severities of transient vibration.
First published as AS 60068.2.57-2003.
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