Inverse-designed acoustic metasurfaces for broadband sound absorption

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作者：
Zhao, Dan-Dan [1 ,2 ]
Dong, Hao-Wen [3 ]
Gu, Yan [1 ,2 ]
Qu, Wen-Zhen [1 ,2 ]
Zhao, Sheng-Dong [1 ,2 ]
机构：
[1] School of Mathematics and Statistics, Qingdao University, Qingdao,266071, China
[2] Institute of Mechanics for Multifunctional Materials and Structures, Qingdao University, Qingdao,266071, China
[3] Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing,100081, China
来源：
Journal of Applied Physics | 1600年 / 136卷 / 16期
关键词：
Acoustic metasurfaces are widely used for noise attenuation due to their outstanding acoustic performance and subwavelength characteristics. The paper introduces a topology-optimized inverse design approach for broadband sound-absorbing metasurfaces; aiming to achieve efficient sound absorption performance across a wide frequency spectrum. By integrating genetic algorithms with the finite element method and driven by objectives such as the absorption frequency range and absorption coefficient; we can transcend the limitations of manual design and fully exploit the design potential of structures. Furthermore; the study investigates the sound absorption mechanism and thermal-viscous dissipation through finite element simulations and experimental validations. The research findings reveal that the proposed broadband sound-absorbing metasurfaces demonstrate excellent sound absorption capabilities across the designated frequency range; boasting an average sound absorption coefficient exceeding 85%. These findings offer fresh perspectives and methodologies for advancing the research and practical application of broadband sound-absorbing metasurfaces. © 2024 Author(s);
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