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Random Vibration and Accelerated Life Testing

[+] Author Affiliations
Jon S. Pointer

Woodward, Inc., Loveland, CO

Paper No. DETC2014-34025, pp. V008T11A079; 5 pages
doi:10.1115/DETC2014-34025
From:
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 26th Conference on Mechanical Vibration and Noise
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4641-4
  • Copyright © 2014 by ASME

abstract

Increasingly random vibration testing is being utilized to validate products that are exposed to high levels of vibration across a wide frequency range when in use. Basic methods utilize the inverse power law and step test to failure to correlate test time at amplified vibration levels to predicted life at in-use conditions. However, many areas of this practice are debated including the selection of a proper exponent for life calculations, selection of test time and test levels, and correlation between dissimilar test and in-use vibration profiles. This paper explores the current literature on the topic and recommends a step by step method for utilizing random vibration testing to validate products that are subjected to a high degree of in-use vibration variability.

Copyright © 2014 by ASME

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