期刊
PROBABILISTIC ENGINEERING MECHANICS
卷 28, 期 -, 页码 2-10出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.probengmech.2011.08.018
关键词
Dynamics; Hysteresis; Linearization; Model correction; Reliability; Response surface; Stochastic process
A gradient-free method is developed for finding the design point in nonlinear stochastic dynamic analysis, where the input excitation is discretized into a large number of random variables. This point defines the realization of the excitation that is most likely to give rise to a specific response threshold at a given time. The design point is the essential information in the recently developed tail-equivalent linearization method. The proposed approach employs a variant of the model correction factor method developed by O. Ditlevsen, which is further improved by the use of a novel response surface technique. Example applications to single- and multi-degree-of-freedom hysteretic systems demonstrate the efficiency and accuracy of the method. (c) 2011 Elsevier Ltd. All rights reserved.
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