A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber-Reference-Cited by-同舟云学术

A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber

Published:2018-07-19 Issue:3 Volume:25 Page:538-548
ISSN:1077-5463
Container-title:Journal of Vibration and Control
language:en
Short-container-title:Journal of Vibration and Control

Author:

Gao Nansha¹^ORCID,Zhang Yongyan²

Affiliation:

1. School of Marine Science and Technology, Northwestern Polytechnical University, People’s Republic of China

2. School of Mechanical Engineering, Xi’an Jiaotong University, People’s Republic of China

Abstract

We report an underwater metastructure with excellent acoustic absorption that is constructed by perforating a helix structure into viscoelastic damping rubber. Finite element method results show that this metastructure can achieve the low frequency and broadband acoustic absorption below 1000 Hz. Waveform transformation, multiple scattering, and reflection energy dissipation mechanisms are the critical factors affecting the absorption performance. Different geometries and materials of the helix structure can adjust the acoustic absorption to a great extent. The proposed metastructure provides more possibilities for underwater acoustic manipulation applications.

Funder

China Postdoctoral Science Foundation

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

Link

http://journals.sagepub.com/doi/pdf/10.1177/1077546318788446

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