Journal
ENGINEERING STRUCTURES
Volume 43, Issue -, Pages 120-128Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2012.05.013
Keywords
Multi-component structure; Integrated layout optimization; Prestress; Dynamic response; Random excitation
Categories
Funding
- National Natural Science Foundation of China [11002113, 10925212]
- 973 Program [2011CB610304]
- NPU Foundation for Fundamental Research [NPU-FFR-JC201009]
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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. (C) 2012 Elsevier Ltd. All rights reserved.
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