OPTIMUM RELIABILITY BASED DESIGN CRITERIA FOR ELASTIC STRUCTURES SUBJECT TO RANDOM DYNAMIC LOADS


          

刊名：International Journal of Structural Stability and Dynamics
作者：F. TRENTADUE
G. C. MARANO
刊号：529GL002
ISSN：0219-4554
出版年：2006
年卷期：2006, vol.6, no.4
页码：437-456
总页数：20
分类号：O39
关键词：Structural optimization；Random vibration；Covariance analysis
参考中译：
语种：eng
文摘：In this work a new method for the optimal design of generic elastic structures, subject to random dynamic loads, is proposed. Elastic structures are described as deterministic multi-degree of freedom systems in which the structural failure probability, referred to as a first crossing passage problem, is minimized. The proposed method is here applied to optimize the shape of a vertical column with an extra-mass located at the free top end, subject to a base acceleration modeled as a Gaussian, stationary, filtered stochastic process. The elastic threshold crossing probabilities are determined in a finite number of column sections and the objective function is assumed to be a measure of these probabilities. Finally, this measure is minimized under a constant weight constraint (or even under more general conditions).



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