Reliability-based optimization of trusses with random parameters under dynamic loads

被引：0
作者：
Juan Ma
Peter Wriggers
Wei Gao
Jian Jun Chen
Shahab Sahraee
机构：
[1] Xidian University,School of Electromechanical Engineering
[2] Leibniz Universität Hannover,Faculty of Mechanical Engineering
[3] The University of New South Wales,School of Civil and Environmental Engineering
来源：
Computational Mechanics | 2011年 / 47卷
关键词：
Reliability-based optimization technique; The minimum mean value of random mass; Stationary stochastic process excitation; Structures with random parameters; Element and system dynamic reliability constraints;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this work, a reliability-based optimization technique is addressed to obtain the minimum mean value of random mass of the structures with random parameters under stationary stochastic process excitation. The challenge of the problem lies in randomness involved from both structural parameters and dynamic load, which renders the structural reliability becoming the random dynamic reliability of the first passage problem. In order to obtain minimum mean value of random gross mass, element and system dynamic reliability constraints are constructed, respectively, and the structural sizing and shape optimization models based on the dynamic reliability are then presented. Moreover, among two optimal strategies proposed for optimization models, the second one can effectively reduce the workload by avoiding the computation of the variance of the dynamic response during the iterative process. Finally, the implementation of three examples is discussed to display the feasibility and validity of optimization technique given.
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页码：627 / 640
页数：13
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