Feasibility of Auto‐Regressive Simulation Model for Fatigue Studies
Publication: Journal of Structural Engineering
Volume 116, Issue 9
Abstract
Experimental results from 20 welded specimens are presented to establish the validity of an auto‐regressive simulation technique for fatigue studies. The key parameter in simulating time histories with the auto‐regressive model is the correlation coefficient of the subsequent extrema of the loading process, which seems to be a useful measure in determining the fatigue damage. The auto‐regressive model can be used to simulate loadings that have unimodal (both rectangular and smooth) power spectral densities. Fatigue estimates with narrowband and somewhat broadband normal and nearly normal loadings are performed. Experimental results indicate that the time histories simulated using the auto‐regressive model produce the same fatigue damage as those simulated by the commonly used Gaussian simulation technique. Fatigue‐life predictions by the commonly used analytical techniques, however, substantially overestimate the experimental results.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 116 • Issue 9 • September 1990
Pages: 2481 - 2495
Copyright
Copyright © 1990 ASCE.
History
Published online: Sep 1, 1990
Published in print: Sep 1990
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