加载非对称质量块的薄膜型超材料的隔音特性及优化设计

Acoustic Insulation Characteristics and Optimal Design of Membrane-Type Metamaterials Loaded with Asymmetric Mass Blocks.

作者信息

Jiang Renjie, Shi Geman, Huang Chengmao, Zheng Weiguang, Li Shande

机构信息

State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.

出版信息

Materials (Basel). 2023 Feb 3;16(3):1308. doi: 10.3390/ma16031308.

DOI:10.3390/ma16031308

PMID:36770314

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9919679/

Abstract

Membrane-type acoustic metamaterials (MAMs) are the focus of the current research due to their lightweight, small size, and good low-frequency sound insulation performance. However, there exists difficulties for extensive application because of the narrow sound insulation band. In order to achieve broadband sound isolation under the premise of lightweight, a novel MAM with asymmetric rings is firstly proposed in this paper. The sound transmission loss (STL) of this MAM is calculated by an analytical method and is verified by the finite element model. The different properties of the membrane when it is loaded with one, two, or four mass blocks are analyzed. The comparison with the traditional MAM proves the superior performance of this novel MAM. Moreover, by discussing the influence of the eccentricity and distribution position of the masses on the results, the tunability of the sound insulation performance of this MAM is proven. Finally, the Isight platform is used to optimize the MAM to further improve the broadband sound insulation performance: the average STL of the MAM is improved by 15.7%, the bandwidth above 30 dB is improved by 11.5%, and the mass density is reduced by 30.01%.

摘要

薄膜型声学超材料（MAMs）因其重量轻、尺寸小和良好的低频隔音性能而成为当前研究的重点。然而，由于隔音带宽窄，其广泛应用存在困难。为了在轻量化的前提下实现宽带隔音，本文首先提出了一种具有不对称环的新型MAM。通过解析方法计算了该MAM的传声损失（STL），并通过有限元模型进行了验证。分析了薄膜在加载一个、两个或四个质量块时的不同特性。与传统MAM的比较证明了这种新型MAM的优越性能。此外，通过讨论质量块的偏心度和分布位置对结果的影响，证明了该MAM隔音性能的可调性。最后，利用Isight平台对MAM进行优化，进一步提高宽带隔音性能：MAM的平均STL提高了15.7%，30dB以上的带宽提高了11.5%，质量密度降低了30.01%。