Transverse coupled resonances for ultrathin lightweight acoustic metamaterials

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-28 DOI:10.1016/j.tws.2025.113219

G. Sal-Anglada , D. Yago , J. Cante , J. Oliver , T. Pàmies , D. Roca

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引用次数: 0

Abstract

Innovations in acoustic metamaterials increasingly focus on optimizing sound insulation capabilities while addressing manufacturing and integration challenges. Previous studies have explored coupled resonance mechanisms in multilayered structures, where resonators are aligned along the direction of wave propagation. While these approaches provide enhanced sound transmission loss (STL) over broadband frequency ranges, they often require increased panel thickness to achieve the desired insulation. This study introduces a novel approach based on transverse coupled resonances, where the resonators are arranged in the same plane, i.e., perpendicular to wave propagation, by exploiting bending effects in the metamaterial design. By implementing these mechanisms in a single layer, the resulting panel’s thickness and weight are significantly reduced, simplifying the manufacturing process. The proposed transverse coupled-resonances acoustic metamaterial (TCAM) is validated numerically and experimentally using impedance tube measurements, with prototypes achieving 60 dB of attenuation over a broad frequency range around 1000 Hz. Further parametric studies show the potential for enhanced sound attenuation at even lower frequencies with thinner and lighter designs, paving the way for customizable soundproofing solutions tailored to specific application requirements.

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超薄轻质声学超材料的横向耦合共振

声学超材料的创新越来越关注于优化隔音能力，同时解决制造和集成方面的挑战。以前的研究已经探索了多层结构中的耦合共振机制，其中谐振器沿着波的传播方向排列。虽然这些方法在宽带频率范围内提高了声音传输损失（STL），但它们通常需要增加面板厚度以达到所需的隔热效果。本研究提出了一种基于横向耦合共振的新方法，该方法利用超材料设计中的弯曲效应，将谐振腔布置在同一平面上，即垂直于波的传播。通过在单层中实现这些机制，所得到的面板的厚度和重量显着减少，简化了制造过程。采用阻抗管测量方法对所提出的横向耦合共振声学超材料（TCAM）进行了数值和实验验证，原型在1000 Hz左右的宽频率范围内实现了60 dB的衰减。进一步的参数研究表明，采用更薄、更轻的设计，可以在更低的频率下增强声音衰减，为定制化的隔音解决方案铺平了道路，以满足特定的应用要求。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.