Reconfigurable spiral underwater sound-absorbing metasurfaces

被引：23
|
作者：
Wu, Huilan [1 ,2 ]
Zhang, Han [3 ]
Hao, Chengpeng [1 ]
机构：
[1] Chinese Acad Sci, Inst Acoust, Key Lab Underwater Vehicle Informat Technol, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Inst Acoust, Key Lab Noise & Vibrat, Beijing 100190, Peoples R China
来源：
EXTREME MECHANICS LETTERS | 2021年 / 47卷
基金：
中国国家自然科学基金;
关键词：
Spiral metasurface; Reconfigurable structure; Quasi-perfect sound absorption; ABSORPTION; WAVE;
D O I：
10.1016/j.eml.2021.101361
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A well-designed coiled metasurface can be applied to obtain extraordinary underwater sound isolation. In this letter, we propose a quasi-perfect sound-absorbing metasurface in spiral shape form. This spiral metasurface(SM) meets the two conditions for perfect absorption, which are no transmission at the outlet and no reflection at the inlet. The sound-absorbing characteristics of the SM are investigated through numerical simulation. The simulation results show that the peak frequency of prefect sound absorption can be tuned flexibly over the spectrum, which depends on the design of the parameters. The frequency-controllable SM has quasi-prefect sound absorption coefficient(up to almost 0.998). (c) 2021 Elsevier Ltd. All rights reserved.
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页数：8
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