Structural design of low-frequency broadband adaptive nonlinear underwater acoustic absorption metasurface

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-06-16 DOI:10.1016/j.apacoust.2025.110894

Hongming Wang , Qingkai Han , Hangyuan Lv

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引用次数: 0

Abstract

To date, most underwater metasurface units are designed with rigid connections, which limit their ability to conform perfectly to the complex curved surfaces of medium- and small-sized vehicles. This challenge is addressed by introducing degrees of freedom among the units. In this paper, we propose four absorptive elements integrated into a steel framework that can rotate around an axis, thereby forming a unit of the adaptive metasurface. Simulations and experiments demonstrate that the proposed underwater acoustic absorption metasurface, with a subwavelength thickness of λ/154, achieves a sound absorption coefficient exceeding 0.8 across the frequency ranges of 309–2202 Hz and 3292–10,000 Hz. Furthermore, low-frequency acoustic absorption is enhanced as the bending angles between the metasurface units increase. This design approach not only broadens the low-frequency acoustic absorption bandwidth of the adaptive metasurface but also provides a reference for its more effective application in engineering contexts.

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低频宽带自适应非线性水声吸收超表面结构设计

迄今为止，大多数水下超表面装置都是采用刚性连接设计的，这限制了它们完全符合中小型车辆复杂曲面的能力。这个挑战是通过在单元之间引入自由度来解决的。在本文中，我们提出了四个吸收元素集成到一个可以绕轴旋转的钢框架中，从而形成一个自适应超表面单元。仿真和实验表明，所提出的亚波长厚度为λ/154的水声吸收超表面在309 ~ 2202hz和3292 ~ 10000 Hz的频率范围内吸声系数均超过0.8。此外，随着超表面单元之间弯曲角度的增加，低频声吸收增强。这种设计方法不仅拓宽了自适应超表面的低频吸声带宽，而且为其在工程中的更有效应用提供了参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.