Sound insulation properties of membrane-type acoustic metamaterials with petal-like split rings
Sound insulation properties of membrane-type acoustic metamaterials with petal-like split rings
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DOI：
10.1088/1361-6463/ac2fda
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发表时间：
2022-01-27
影响因子：
3.4
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Huang, Yonghu;Lv, Mengyuan;Li, Qing
膜式声学超材料（MAM）是一种轻质、脆弱的材料，具有优异的低频隔声性能，打破了传统质量定律的限制，为低频范围内的降噪提供了新的思路。为了在轻量化设计的前提下进一步拓宽隔声带宽，提出了一种新型花瓣环MAM，并对开口环的结构参数进行了参数化研究。通过有限元模型仿真和阻抗管试验相结合，验证了所提结构的有效性和数值模拟的正确性。此外，还计算和分析了四种不同结构的传声损失曲线和模态形状，以阐明新型结构的隔声机理。最后，对新型结构中开口环的宽度、中心角、质心位置和重量进行参数分析，找出隔声特性的调节规律。
Membrane-type acoustic metamaterials (MAMs) are lightweight and flimsy materials with excellent low-frequency insulation performance, which breaks the limitations of the traditional mass law and provides a new idea for noise reduction in the low-frequency range. To further broaden the sound insulation bandwidth on the premise of lightweight design, a novel MAM with petal-like rings is proposed, and the parametric studies on the structural parameters of split rings are carried out in this paper. By combining the finite element model simulation and impedance tube test, the effectiveness of the proposed structure and the correctness of the numerical simulation are validated. Moreover, the sound transmission loss curves and modal shapes of four different structures are computed and analyzed to clarify the insulation mechanism of the novel structure. Finally, the width, the center angle, the centroid position, and the weight of the split rings in the novel structure are parametrically analyzed to figure out the regulation rules of the sound insulation characteristics.