Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating

doi:10.1088/1674-1056/25/2/024302

中国物理B ›› 2016, Vol. 25 ›› Issue (2): 24302-024302.doi: 10.1088/1674-1056/25/2/024302

所属专题： Virtual Special Topic — Acoustics

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating

Ling-Zhi Huang(黄凌志), Yong Xiao(肖勇), Ji-Hong Wen(温激鸿), Hai-Bin Yang(杨海滨), Xi-Sen Wen(温熙森)

Vibration and Acoustics Research Group, Laboratory of Science and Technologyon Integrated Logistics Support, College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China

收稿日期:2015-08-30 修回日期:2015-10-14 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: Ji-Hong Wen E-mail:wenjihong@vip.sina.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51305448 and 51275519).

Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating

Ling-Zhi Huang(黄凌志), Yong Xiao(肖勇), Ji-Hong Wen(温激鸿), Hai-Bin Yang(杨海滨), Xi-Sen Wen(温熙森)

Vibration and Acoustics Research Group, Laboratory of Science and Technologyon Integrated Logistics Support, College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China

Received:2015-08-30 Revised:2015-10-14 Online:2016-02-05 Published:2016-02-05
Contact: Ji-Hong Wen E-mail:wenjihong@vip.sina.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51305448 and 51275519).

摘要/Abstract

摘要： This paper presents a semi-analytical solution for the vibration and sound radiation of a semi-infinite plate covered by a decoupling layer consisting of locally resonant acoustic metamaterial. Formulations are derived based on a combination use of effective medium theory and the theory of elasticity for the decoupling material. Theoretical results show good agreements between the method developed in this paper and the conventional finite element method (FEM), but the method of this paper is more efficient than FEM. Numerical results also show that system with acoustic metamaterial decoupling layer exhibits significant noise reduction performance at the local resonance frequency of the acoustic metamaterial, and such performance can be ascribed to the vibration suppression of the base plate. It is demonstrated that the effective density of acoustic metamaterial decoupling layer has a great influence on the mechanical impedance of the system. Furthermore, the resonance frequency of locally resonant structure can be effectively predicted by a simple model, and it can be significantly affected by the material properties of the locally resonant structure.

关键词: locally resonant, decoupling mechanism, underwater sound radiation

Abstract: This paper presents a semi-analytical solution for the vibration and sound radiation of a semi-infinite plate covered by a decoupling layer consisting of locally resonant acoustic metamaterial. Formulations are derived based on a combination use of effective medium theory and the theory of elasticity for the decoupling material. Theoretical results show good agreements between the method developed in this paper and the conventional finite element method (FEM), but the method of this paper is more efficient than FEM. Numerical results also show that system with acoustic metamaterial decoupling layer exhibits significant noise reduction performance at the local resonance frequency of the acoustic metamaterial, and such performance can be ascribed to the vibration suppression of the base plate. It is demonstrated that the effective density of acoustic metamaterial decoupling layer has a great influence on the mechanical impedance of the system. Furthermore, the resonance frequency of locally resonant structure can be effectively predicted by a simple model, and it can be significantly affected by the material properties of the locally resonant structure.

Key words: locally resonant, decoupling mechanism, underwater sound radiation

中图分类号: (General linear acoustics)

43.20.+g

43.30.Jx (Radiation from objects vibrating under water, acoustic and mechanical impedance)

黄凌志, 肖勇, 温激鸿, 杨海滨, 温熙森. Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating[J]. 中国物理B, 2016, 25(2): 24302-024302.

Ling-Zhi Huang(黄凌志), Yong Xiao(肖勇), Ji-Hong Wen(温激鸿), Hai-Bin Yang(杨海滨), Xi-Sen Wen(温熙森). Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating[J]. Chin. Phys. B, 2016, 25(2): 24302-024302.

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Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating

Analysis of underwater decoupling properties of a locally resonant acoustic metamaterial coating

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