Broadband sound absorption design of coupled Helmholtz resonator arrays with perforated panels

IF 3.4 2区 物理与天体物理 Q1 ACOUSTICS
Shuai Wang , Liuhai He , Chunchuan Liu , Fengming Li
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Abstract

This paper proposes a parametric design methodology based on coupling analysis to improve the acoustic performance of conventional Helmholtz resonator arrays with perforated panels, aiming to achieve enhanced low-frequency and broadband sound absorption without structural modifications. Porous material linings are considered within the cavities of the Helmholtz resonators using the double porosity theory. The sound absorption coefficient (SAC) is obtained based on the acoustic impedance in a circular tube and the equivalent circuit method. An acoustic experiment and numerical simulation using the finite element method are carried out for comparison. The complex frequency plane method is applied to elucidate the coupling effects among the absorbers. By coupling the perforated panels with Helmholtz resonator arrays, the zeros of the distinct absorbers move along the positive direction of the imaginary frequency axis, resulting in an acoustic absorber with high SAC and widened sound absorption band. The paper provides a method to design high-performance absorbers under geometric constraints, enabling tailored noise control solutions without structural redesign.
带穿孔板耦合亥姆霍兹谐振器阵列的宽带吸声设计
本文提出了一种基于耦合分析的参数化设计方法来改善传统穿孔板亥姆霍兹谐振器阵列的声学性能,目的是在不改变结构的情况下实现低频和宽带的增强吸声。利用双孔理论研究了亥姆霍兹谐振腔内的多孔材料衬里。根据圆管内的声阻抗和等效电路法计算了吸声系数。利用有限元方法进行了声学实验和数值模拟比较。采用复频率平面法分析了吸波器之间的耦合效应。通过将穿孔板与亥姆霍兹谐振器阵列耦合,不同吸声器的零点沿虚频率轴的正方向移动,从而得到具有高SAC和扩宽吸声带的吸声器。本文提供了一种在几何约束下设计高性能吸波器的方法,无需重新设计结构即可实现定制的噪声控制解决方案。
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
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.
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