CMA-ES based topology optimization for acoustic cloak
This paper presents a topology optimization based on a covariance matrix adaptation evolution strategy (CMA-ES) for acoustic cloaks rendering a scattering object acoustically invisible. The cloaks are designed by minimizing the scattering of acoustic waves around the object and the objective functio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2018-03-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00590/_pdf/-char/en |
| Summary: | This paper presents a topology optimization based on a covariance matrix adaptation evolution strategy (CMA-ES) for acoustic cloaks rendering a scattering object acoustically invisible. The cloaks are designed by minimizing the scattering of acoustic waves around the object and the objective function is defined as the integrated intensity of the scattered wave. CMA-ES is employed to search the optimal set of level set functions as design variables during a topology optimization for minimizing the objective function regularized by a perimeter constraint. Level set functions express structures with its structural boundaries clearly without grayscales during the optimization process. In the best case in our simulation, we succeed to obtain an optimal configuration which can reduce the amount of acoustic scattering to 0.81% of that in the absence of cloaking. |
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| ISSN: | 2187-9761 |