JIS C 60068-2-57:2018

Table of Contents

Introduction
1 Scope and object
2 Normative references
3 Definitions
3.1 critical frequency
3.2 damping
3.3 critical damping
3.4 damping ratio
3.5 signal tolerance
3.6 fixing point
3.7 g[n]
3.8 high peaks of the response
3.9 measuring points
3.9.1 check point
3.9.2 reference point
3.10 natural frequency
3.11 natural time-history
3.12 oscillator
3.13 pause
3.14 preferred motion sample
3.16 required response spectrum
3.17 response spectrum
3.18 sampling frequency
3.19 strong part of the required response spectrum
3.20 strong part of the time-history
3.21 sweep cycle
3.22 synthesized time-history
3.23 test level
3.24 test response spectrum
3.25 time-history
3.26 zero period acceleration
4 General requirements
5 Requirements for testing
5.1 Vibration response investigation
5.1.1 Basic motion
5.1.2 Spurious motion
5.1.3 Signal tolerance
5.1.4 Vibration amplitude tolerances
5.1.5 Frequency tolerances
5.1.6 Sweeping
5.1.7 Damping ratio
5.2 Time-history testing
5.2.1 Basic motion
5.2.2 Transverse motion
5.2.3 Rotational motion
5.2.4 Tolerance zone for the required response spectrum
5.2.5 Frequency range
5.2.6 Calculation of the test response spectrum
5.3 Mounting
6 Severities
6.1 Test frequency range
6.2 Required response spectrum
6.3 Number and duration of time-histories
6.3.1 Number of time-histories
6.3.2 Time-history duration
6.3.3 Duration of the strong part of the time-history
6.4 Number of high peaks of the response
7 Preconditioning
8 Initial measurements
9 Testing
9.1 General
9.2 Vibration response investigation
9.3 Time-history testing
9.3.1 Single axis testing
9.3.2 Biaxial testing
9.3.3 Triaxial testing
10 Intermediate measurements
11 Recovery
12 Final measurements
13 Information to be given in the relevant specification
Annex A (informative) Synthesis of the artificial
time-history: Guidance
Annex B (informative) Test frequency ranges

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Japanese Standards Association
Pages
ISBN
Supersedes	JIS C 60068-2-57:2002