High-efficiency nonlocal focusing waterborne acoustic metasurfaces

被引：0
|
作者：
Yang T. [1 ]
Yang T. [1 ]
机构：
[1] School of Mechanical Engineering and Automation, Northeastern University, Shenyang
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 09期
关键词：
fluid-solid coupling interaction; focusing; high efficiency; long-range interaction; metasurfaces; nonlocal; underwater communication; waterborne;
D O I：
10.11990/jheu.202205029
中图分类号：
学科分类号：
摘要：
A type of nonlocal waterborne acoustic metasurfaces (WAMs) is proposed to improve the low focusing efficiency of conventional WAMs. Based on the generalized Snell′s law, this nonlocal design enhances the long-range interaction and takes the effects of fluid-solid interaction into account. The theoretical models of the local and nonlocal designs are developed respectively using the finite element simulation software COMSOL Multiphysics, and the focusing cases of the two designs under different incidence conditions are presented. Comparing the simulation results, the focusing efficiency is improved from 35.70% to 48.73%. Additionally, the nonlocal design appears more robust to fluctuations in the incidence frequency, angle, and focal distance. The device is easy to implement in underwater signal communication and high-resolution ultrasonic imaging. © 2022 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1299 / 1305
页数：6
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