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Effect of spectral shape on acoustic fatigue life estimatesMethods for estimating fatigue life due to random loading are briefly reviewed. These methods include a probabilistic approach in which the expected value of the rate of damage accumulation is computed by integrating over the probability density of damaging events and a method which consists of analyzing the response time history to count damaging events. It is noted that it is necessary to employ a time domain approach to perform Rainflow counting, while simple peak counting may be accomplished using the probabilistic method. Data obtained indicate that Rainflow counting produces significantly different fatigue life predictions than other methods that are commonly used in acoustic fatigue predictions. When low-frequency oscillations are present in a signal along with high-frequency components, peak counting will produce substantially shorter fatigue lives than Rainflow counting. It is concluded that Rainflow counting is capable of providing reliable fatigue life predictions for acoustic fatigue studies.
Document ID
19920049100
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Miles, R. N.
(New York, State University Binghamton, United States)
Date Acquired
August 15, 2013
Publication Date
March 8, 1992
Publication Information
Publication: Journal of Sound and Vibration
Volume: 153
ISSN: 0022-460X
Subject Category
Acoustics
Accession Number
92A31724
Funding Number(s)
CONTRACT_GRANT: NSF MSS-90-06869
Distribution Limits
Public
Copyright
Other

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