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Non-stationary response of large linear FE models under stochastic loading

✍ Scribed by G.I. Schuëller; H.J. Pradlwarter; C.A. Schenk

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
727 KB
Volume
81
Category
Article
ISSN
0045-7949

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✦ Synopsis

A numerical procedure to compute the statistical second moment (variance) characteristics of the response of linear structures--modeled by large FE models--under stochastic loading is presented. For this purpose modal analysis including a static correction procedure is applied in order to calculate the structural response. A non-white, non-zero mean, non-stationary, distributed loading as applied is represented by the well known Karhunen-Lo e eve expansion, which allows to describe any type of non-white excitation and can be easily adjusted to available statistical data. In the proposed approach, step-by-step integration procedures developed for deterministic FE analysis are applied in order to compute the second moment characteristics of the stochastic response.

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