Actively tunable sandwich acoustic metamaterials with magnetorheological elastomers

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外文标题：Actively tunable sandwich acoustic metamaterials with magnetorheological elastomers

外文摘要：Sandwich structures are widespread in engineering applications because of their advantageous mechanical properties.Recently,their acoustic performance has also been improved to enable attenuation of low-frequency vibrations induced by noisy environ-ments.Here,we propose a new design of sandwich plates(SPs)featuring a metamaterial core with an actively tunable low-frequency bandgap.The core contains magnetorheolog-ical elastomer(MRE)resonators which are arranged periodically and enable controlling wave attenuation by an external magnetic field.We analytically estimate the sound transmission loss(STL)of the plate using the space harmonic expansion method.The low frequency sound insulation performance is also analyzed by the equivalent dynamic density method,and the accuracy of the obtained results is verified by finite-element simulations.Our results demonstrate that the STL of the proposed plate is enhanced compared with a typical SP analog,and the induced bandgap can be effectively tuned to desired frequencies.This study further advances the field of actively controlled acoustic metamaterials,and paves the way to their practical applications.

外文关键词：

sandwich plate(SP)magnetorheological elastomer(MRE)sound trans-mission loss(STL)vibration controlacoustic metamaterial

作者：

Jinhui LIU、Yu XUE、Zhihong GAO、A.O.KRUSHYNSKA、Jinqiang LI

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作者单位：

College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China

Engineering and Technology Institute of Groningen(ENTEG),University of Groningen,Groningen 9700 AB,The Netherlands

关键词：

sandwich plate(SP) magnetorheological elastomer(MRE) sound trans-mission loss(STL) vibration control acoustic metamaterial

出版年：

2024

DOI：

10.1007/s10483-024-3186-9

应用数学和力学(英文版)

上海大学

应用数学和力学(英文版)

影响因子：0.294

ISSN：0253-4827

年,卷(期)：2024.45(11)