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Low-frequency band gap of locally resonant phononic crystals with a dual-base plate

Authors :
Shuguang Zuo
Haidong Huang
Minghai Zhang
Xudong Wu
Tianxin Ni
Source :
The Journal of the Acoustical Society of America. 143:1326-1332
Publication Year :
2018
Publisher :
Acoustical Society of America (ASA), 2018.

Abstract

To achieve a wider band gap and a lower cut-on frequency, a locally resonant phononic crystal (LRPC) with a dual-base plate is investigated in this paper. Compared with the LRPC with a single plate, the band structure of the LRPC with a dual-base plate is calculated using the method of plane wave expansion and verified by the finite element method. According to the analysis of the band curves of the LRPC with a dual-base plate, the mechanisms are explained. Next, the influences of the thickness of the plates, the stiffness of the springs, the mass of resonators, and the lattice constant are also investigated. The results show that the structural asymmetry between the upper and the lower plate is conducive to reducing the cut-on frequency and broadening the band gap effectively. The results indicate a different approach for the application of LRPC in vibration and noise control.

Details

ISSN :
00014966
Volume :
143
Database :
OpenAIRE
Journal :
The Journal of the Acoustical Society of America
Accession number :
edsair.doi.dedup.....829a1a77383d9293b6c346e42c59bd4b
Full Text :
https://doi.org/10.1121/1.5025041