Layout optimization of multi-component structures under static loads and random excitations

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• 作者：Zhang Qiao ; Zhang Weihong ; Zhu Jihong ; Gao Tong
• 关键词：Multi-component structure ; Integrated layout optimization ; Prestress ; Dynamic response ; Random excitation
• 刊名：Engineering Structures
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：43
• 期：Complete
• 页码：120-128
• 全文大小：768 K

文摘

Integrated layout optimization of multi-component structures under static loads and random excitations is studied in this paper. Dynamic responses are obtained by using the mode superposition method, and the prestress effect introduced by the static loads is taken into account in the analyses of dynamic responses. Locations of embedded components and pseudo-densities related to supporting structure are chosen as design variables. Design sensitivities of the dynamic responses with respect to the pseudo-densities are analytically derived. The optimization algorithm GCMMA (Global Convergent Method of Moving Asymptotes algorithm) is used to minimize simultaneously the static strain energy and dynamic responses. Three numerical examples are presented to show the validity of the optimization procedure and its potential application in practical designs.