Topology-optimized design of a solid cover layer on porous materials for low-frequency broadband sound absorption

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-03-01 DOI:10.1016/j.apacoust.2025.110619

Zhihui Hu , Shengtian Wen , Lei Xiang , Gongxian Wang

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引用次数: 0

Abstract

To improve the low-frequency sound absorption performance of porous materials, a solid cover layer is placed over the porous material. The solid structure is designed by means of a density-based topology optimization method and in combination with polyurethane foam (PUF) to form a resonant composite structure. The performance of this PUF is modeled using the Johnson-Champoux-Allard (JCA) model. With the same dimensions, such an optimized design can significantly shift the peak sound absorption to lower frequencies compared to that of the PUF. Our sound absorption peaks up to 0.85 at 764 Hz, and the bandwidth

(α > 0.5)

is 394 Hz. The thickness of the composite structure is less than 11.1 % of the operating wavelength. Our topology optimized solid cover layer is simplified effectively. The results of our simulations and experiments corroborate the soundness of our design. Such hybrid acoustic materials and its design approach can provide more design ideas for future acoustic materials.

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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.