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Accelerating a phase field method by linearization for eigenfrequency topology optimization

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Abstract

Topology optimization of eigenfrequencies has significant applications in science, engineering, and industry. Eigenvalue problems as constraints of optimization with partial differential equations are solved repeatedly during optimization and design process. The nonlinearity of the eigenvalue problem leads to expensive numerical solvers and thus requires huge computational costs for the whole optimization process. In this paper, we propose a simple yet efficient linearization approach and use a phase field method for topology optimization of eigenvalue problems with applications in two models: vibrating structures and photonic crystals. More specifically, the eigenvalue problem is replaced by a linear source problem every few optimization steps for saving computational costs. Numerical evidence suggests first-order accuracy of approximate eigenvalues and eigenfunctions with respect to the time step and mesh size. Numerical examples are presented to illustrate the effectiveness and efficiency of the algorithms.

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Funding

This work was supported in part by the Key Technologies Research and Development Program (Grant No. 2022YFA1004402), the National Natural Science Foundation of China (Grant No. 12071149), the Science and Technology Commission of Shanghai Municipality (No. 22ZR1421900 and No. 22DZ2229014), and the Natural Science Foundation of Chongqing, China (Grant No. CSTB2023NSCQ-MSX1079).

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Correspondence to Meizhi Qian.

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We state that the results presented in this paper can be reproduced by the codes provided by authors upon reasonable request.

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Responsible Editor: Makoto Ohsaki

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Hu, X., Qian, M. & Zhu, S. Accelerating a phase field method by linearization for eigenfrequency topology optimization. Struct Multidisc Optim 66, 242 (2023). https://doi.org/10.1007/s00158-023-03692-9

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  • DOI: https://doi.org/10.1007/s00158-023-03692-9

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