A Membrane-Type Acoustic Metamaterial With Self-Similar Structure

DOI

10.2991/jimec-17.2017.47How to use a DOI?

Keywords

Self-similar, acoustic metamaterial, locally resonant, band-gap.

Abstract

The locally resonant membrane-type metamaterial has a unique feature of narrow frequency band-gaps where the waves can't propagate, therefore it would be not suitable for broadband noise reduction. To broaden the frequency band-gap, we proposed a self-similar structure with ring mass for the membrane-type metamaterial in the present work. The dispersion curves of the self-similar structures under equal-biaxial tension were obtained by using finite element method. It is found that the number of band-gap increases with an increase of the ring mass. In this sense, the frequency band-gap is broadened. The analysis of harmonic response revealed that the anti-resonant frequency was just located in the first band-gap in the dispersion curve diagram. For this anti-resonant mode of the local membrane-mass/ring mass resonator, the ring mass vibrated out-of-phase with the membrane, therefore it is anticipated that a transmission loss (TL) peak would appear in the TL profile.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yingxu Fan
AU  - Zhimin Xie
AU  - Yuhong Qie
PY  - 2017/10
DA  - 2017/10
TI  - A Membrane-Type Acoustic Metamaterial With Self-Similar Structure
BT  - Proceedings of the 2017 2nd Joint International Information Technology, Mechanical and Electronic Engineering Conference (JIMEC 2017)
PB  - Atlantis Press
SP  - 212
EP  - 215
SN  - 2352-538X
UR  - https://doi.org/10.2991/jimec-17.2017.47
DO  - 10.2991/jimec-17.2017.47
ID  - Fan2017/10
ER  -