Journal
COMPUTERS & STRUCTURES
Volume 154, Issue -, Pages 41-47Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2015.03.011
Keywords
Truss topology optimization; Robust optimization; Genetic algorithms; Spectral stochastic finite element method
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In this paper an approach to robust topology optimization for truss structures with material and loading uncertainties, and discrete design variables, is investigated. Uncertainties on the loading, and spatially correlated material stiffness, are included in the problem formulation, taking truss element length into account. A more realistic random field representation of the material uncertainties is achieved, compared to classical scalar random variable approaches. A multiobjective approach is used to generate Pareto optimal solutions showing how the mean and standard deviation of the compliance can be considered as separate objectives, avoiding the need for an arbitrary combination factor. (C) 2015 Elsevier Ltd. All rights reserved.
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