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Topology optimization considering material and geometric uncertainties using stochastic collocation methods. (English) Zbl 1274.74360

Summary: The aim of this paper is to introduce the stochastic collocation methods in topology optimization for mechanical systems with material and geometric uncertainties. The random variations are modeled by a memory-less transformation of spatially varying Gaussian random fields which ensures their physical admissibility. The stochastic collocation method combined with the proposed material and geometry uncertainty models provides robust designs by utilizing already developed deterministic solvers. The computational cost is discussed in details and solutions to decrease it, like sparse grids and discretization refinement are proposed and demonstrated as well. The method is utilized in the design of compliant mechanisms.

MSC:

74P15 Topological methods for optimization problems in solid mechanics
49Q12 Sensitivity analysis for optimization problems on manifolds
90C15 Stochastic programming
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