論文

査読有り
2018年6月15日

Topology optimization for hyperbolic acoustic metamaterials using a high-frequency homogenization method

Computer Methods in Applied Mechanics and Engineering
  • Yuki Noguchi
  • ,
  • Takayuki Yamada
  • ,
  • Kazuhiro Izui
  • ,
  • Shinji Nishiwaki

335
開始ページ
419
終了ページ
471
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.cma.2018.02.031
出版者・発行元
Elsevier B.V.

In this paper, we propose a level set-based topology optimization method for the design of hyperbolic acoustic metamaterials using a high-frequency homogenization method. To estimate the properties of acoustic metamaterials, we first introduce the high-frequency homogenization method proposed in previous work, through which the macroscopic wave behavior of periodic structures can be obtained even if the wavelength of impinging acoustic waves is comparable to the size of the unit cell. We propose a new level set-based topology optimization method based on the high-frequency homogenization method that can provide unit cell designs that exhibit hyperbolic dispersion. We compute the topological derivatives using an equation that expresses the relationship between the topological and shape derivatives. Numerical examples are provided to confirm the utility of the newly proposed optimization method. The obtained optimized unit cell designs, configurations of air and aluminum, exhibit hyperbolic dispersion by exploiting resonances induced in the unit cell.

リンク情報
DOI
https://doi.org/10.1016/j.cma.2018.02.031
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85044106957&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85044106957&origin=inward
ID情報
  • DOI : 10.1016/j.cma.2018.02.031
  • ISSN : 0045-7825
  • SCOPUS ID : 85044106957

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