High load-bearing lightweight double-panel metastructures for broadband low-frequency sound insulation

IF 4.3 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration Pub Date : 2025-03-18 DOI:10.1016/j.jsv.2025.119073

Jiajia Guo , Yong Xiao , Heng Ren , Yongqiang Li , Dianlong Yu , Jihong Wen

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引用次数: 0

Abstract

In recent years, the invention of metastructures has greatly promoted the low-frequency sound insulation technique. However, it is still a difficult task to design multifunctional metastructures that possess light weight, high load-bearing property, and good sound insulation performance at broadband low frequencies. To challenge this problem, this study presents a double-panel metastructure comprising two lightweight sandwich plates with lattice truss-core that are separated by an air gap. By perforating the faceplates of the sandwich plates, the double-panel metastructure can realize acoustic resonance without additionally introducing resonators. For efficient calculation and in-depth analysis of the double-panel metastructure, we develop a semi-analytical method by dynamic homogenization of the fluid and solid domains. The effectiveness of the modeling method is verified by comparing it with the vibroacoustic finite element method. The results of numerical examples demonstrate that the double-panel metastructure can exhibit two low-frequency sound insulation peaks. Within a broadband low-frequency range around the two peaks, the sound transmission loss of the double-panel metastructure is much higher than that of traditional double-panel structures and the mass law. Further, the influence of structural parameters is analyzed and an optimization procedure is conducted. Finally, the sound insulation of the metastructure and the load-bearing capacity of the separated sandwich plates are confirmed by comparative experiments.

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用于宽带低频隔音的高承重轻质双面板元结构

近年来，元结构的发明极大地促进了低频隔声技术的发展。然而，设计出重量轻、承载性能高、宽带低频隔声性能好的多功能元结构仍然是一项艰巨的任务。为了挑战这一问题，本研究提出了一种双面板元结构，包括两个轻质夹层板和由气隙分隔的晶格桁架核心。通过在夹层板的面板上穿孔，双面板元结构无需额外引入谐振器即可实现声共振。为了有效地计算和深入分析双面板元结构，我们开发了一种流体和固体领域动态均匀化的半解析方法。通过与振动声有限元法的比较，验证了该建模方法的有效性。数值算例结果表明，双面板元结构可以出现两个低频隔声峰。在两个峰值附近的宽带低频范围内，双面板元结构的声传输损失远高于传统双面板结构和质量律。进一步分析了结构参数的影响，并进行了优化。最后，通过对比实验验证了夹层板的隔声性能和隔声承载力。

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.