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• W3093738923 abstract "In this paper, we propose a level set-based topology optimization method for the unit-cell design of acoustic metasurfaces by using a two-scale homogenization method. Based on previous works, we first propose a homogenization method for acoustic metasurfaces that can be combined with topology optimization. In this method, a nonlocal transmission condition depending on the unit cell of the metasurface appears in a macroscale problem. Next, we formulate an optimization problem within the framework of a level set-based topology optimization method, wherein an objective functional is expressed as the macroscopic responses obtained through the homogenization, and material distributions in the unit cell are set as design variables. A sensitivity analysis is conducted based on the concept of the topological derivative. To confirm the validity of the proposed method, two-dimensional numerical examples are provided. First, we provide a numerical example that supports the validity of the homogenization method, and we then perform optimization calculations based on the waveguide settings of the acoustic metasurfaces. In addition, we discuss the mechanism of the obtained optimized structures." @default.
• W3093738923 created "2020-10-29" @default.
• W3093738923 creator A5041530029 @default.
• W3093738923 creator A5053785117 @default.
• W3093738923 date "2021-10-01" @default.
• W3093738923 modified "2023-09-30" @default.
• W3093738923 title "Topology optimization of acoustic metasurfaces by using a two-scale homogenization method" @default.
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• W3093738923 doi "https://doi.org/10.1016/j.apm.2021.05.005" @default.
• W3093738923 hasPublicationYear "2021" @default.
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