Abstract
This paper implements a novel integration of the polynomial dimensional decomposition (PDD), topology derivative, and level-set method for robust topology optimization subject to a large number of random inputs. With this method, the influence of a large number of random inputs can be easily captured in an accurate manner. In addition, the stochastic moments and their sensitivities can be obtained from analytical expressions based on the PDD approximation of response functions and the deterministic topology derivative. Only a single stochastic analysis is required for evaluating the moments and their sensitivities in each iteration. The topology is described by the level-set function and its evolution is driven by solving the reaction-diffusion equation of the level-set function. An augmented Lagrange penalty formulation dovetails the stochastic topology derivatives of objective and constraints into the reaction term in the reaction-diffusion equation, which generates a new topology during the iteration process. The practical examples illustrate that the proposed method can render meaningful optimal designs for structures subject to several or a large number of random inputs.
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The authors acknowledge financial support from the US National Science Foundation under Grant No. CMMI-1635167 and the startup funding of Georgia Southern University.
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The detailed data that support the findings of this study are available from the corresponding author upon reasonable request. The distribution of the associated software/code is planned to be initiated after several coming articles in this project are published.
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Ren, X., Zhang, X. A polynomial dimensional decomposition-based method for robust topology optimization. Struct Multidisc Optim 64, 3527–3548 (2021). https://doi.org/10.1007/s00158-021-03036-5
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DOI: https://doi.org/10.1007/s00158-021-03036-5