BS 2011-2.1Fdb:1973

Superseded

View Superseded by

Environmental testing. Tests Test Fdb. Random vibration - wide band reproducibility medium

Available format(s)

Hardcopy , PDF

Superseded date

01-03-2004

Language(s)

English

Published date

15-11-1973

Publisher

British Standards Institution

Foreword
Specification
1 Object
2 Mounting and control
2.1 General
2.2 Mounting of components
2.3 Mounting of equipment
2.4 Reference and control points
3 Frequency response measurements and resonance
     searches
3.1 Sinusoidal amplitude
3.2 Frequency response measurement procedure
3.3 Resonance search procedure
4 Vibration motion requirements
4.1 Basic motion
4.2 Distribution
4.3 Acceleration spectral density spectrum and total
     r.m.s. acceleration requirements
4.4 Total r.m.s. acceleration values within the
     specified frequency range
4.5 Displacement limitations
5 Choice of confirmation method
5.1 Criteria for choice
5.2 Applicability of the recommended confirmation
     methods
5.3 Mixed confirmation methods
6 Initial measurements
7 Excitation prior to conditioning
8 Conditioning
9 Final measurements
Appendices
A Confirmation method by swept filter technique
B Confirmation method by fixed filter technique
C Confirmation method by swept sinusoidal technique
Tables
1 Acceleration spectral density and related
     sinusoidal amplitude
2 Tolerance limits for true acceleration spectral
     density and true total r.m.s. acceleration
3 Total r.m.s. acceleration values
4 Variation in acceleration spectral density plus
     instrumentation errors
Figures
1 Determination of peak-notch amplitude ratio Ap/An
2 Peak-notch pairs
3 Tolerance band for distribution of instantaneous
     acceleration values
4 Acceleration spectral density spectrum and
     tolerance limits
5 Illustration of accumulation of errors
6 Analyser error in notch region
7 Analyser error in peak region
8 Remaining ripple after equalization

Gives the test procedure for wide band random vibration tests, reproducibility medium, applicable to components and equipment which may be subjected to conditions in service involving vibration of a stochastic nature.

Committee	GEL/104
DocumentType	Standard
Pages	22
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN 60068-2-64:1995
Supersedes	BS 2011-2F:1966

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