Origami-based acoustic metamaterial for low-frequency adjustable sound absorption

IF 4.3 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration Pub Date : 2025-07-11 DOI:10.1016/j.jsv.2025.119334

Zhaorui Gao , Qing Ma , Jingbo Yang , Cheng Shen , Han Meng

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引用次数: 0

Abstract

It is generally difficult for conventional sound absorbing structures to meet the requirements of adjustable broadband low frequency sound absorption in practical applications. An origami-based micro-perforated sandwich sound absorbing metamaterial (OMSSM) is hence proposed in this paper to solve the problem of frequency variable sound absorption and extend low frequency sound absorption bandwidth. The foldable origami structures installed in the back cavities of the micro-perforated sandwich structure act as reconfigurable Helmholtz resonators, the resonance frequencies of the OMSSM are dramatically changed and can be continuously varied with the volume of origami cavities. An analytical model is firstly built to calculate the sound absorption coefficient of OMSSM, and the effectiveness of the analytical model is then verified through finite element simulation and experiment, with good agreement achieved. The adjustable sound absorption with the variation of folding ratio of the origami cavities is demonstrated after that based on the analytical model. Influences of key geometrical parameters on the sound absorption of the OMSSM are revealed through parameter analysis. The key geometrical parameters are subsequently optimized to broaden the frequency adjustable bandwidth to the fullest extent, and results show that the optimized OMSSM has an adjustable sound absorption band 84.3 % broader than that of non-optimized structure. The proposed OMSSM has great potential for applications in the field of active noise control.

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用于低频可调吸声的折纸声学超材料

在实际应用中，常规吸声结构一般难以满足可调宽带低频吸声的要求。为此，本文提出了一种基于折纸的微孔夹层吸声超材料（OMSSM），以解决变频吸声问题，延长低频吸声带宽。在微穿孔夹层结构的后腔中安装可折叠的折纸结构作为可重构的亥姆霍兹谐振器，其共振频率随折纸腔的体积变化而发生显著变化，并可连续变化。首先建立了解析模型，计算了OMSSM的吸声系数，然后通过有限元仿真和实验验证了解析模型的有效性，得到了较好的一致性。在此基础上，基于解析模型论证了折纸腔的吸声随折纸腔折叠比的变化而变化。通过参数分析，揭示了关键几何参数对OMSSM吸声性能的影响。对关键几何参数进行优化，最大限度地拓宽了频率可调带宽，结果表明，优化后的OMSSM可调吸声带比未优化的OMSSM宽84.3%。该方法在噪声主动控制领域具有广阔的应用前景。

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

Journal of Sound and Vibration 工程技术-工程：机械

CiteScore

9.10

自引率

10.60%

发文量

551

审稿时长

69 days

期刊介绍： The Journal of Sound and Vibration (JSV) is an independent journal devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. There is an emphasis on fundamental work that has potential for practical application. JSV was founded and operates on the premise that the subject of sound and vibration requires a journal that publishes papers of a high technical standard across the various subdisciplines, thus facilitating awareness of techniques and discoveries in one area that may be applicable in others.