Band gap characteristics analysis of a phononic crystal double-layer beam structure based on multi-layer S-type local oscillator

被引：0
|
作者：
Shen C. [1 ]
Huang J. [1 ]
Chen M. [1 ]
Qian D. [1 ]
Wang J. [2 ]
Zhuang J. [1 ]
机构：
[1] School of Naval Architecture & Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang
[2] China Ship Scientific Research Center, Wuxi
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 02期
关键词：
band gap characteristic; band structure; displacement field; noise reduction; phononic crystal; vibration;
D O I：
10.13465/j.cnki.jvs.2023.02.024
中图分类号：
学科分类号：
摘要：
To suppress the propagation of vibration and noise in practical engineering structures, a kind of phononic crystal beam structure was designed. Based on the Bloch theorem of periodic structures, the band structures, displacement fields of eigenmodes and transmission power spectrums of a finite periodic phononic crystal beam structure were calculated by finite element method. The exhibited band gap characteristics were studied. Based on the main mechanism of local resonant band gap formation, the phononic crystal beam structure used for the control of low frequency vibration and noise was studied. The structure could be applied to the vibration and noise reduction at specific frequency in engineering problems. The band gap characteristics of the phononic crystal veneer beam and phononic crystal double-layer beam were analyzed, and the general properties of the phononic crystal single/double layer beam were studied. The influences of various parameters on the attenuation band of the band gap of phononic crystal beam structures was studied, and the low frequency vibration isolation in a specific range can be realized through reasonable design of parameters. The structure proposed has a good application prospect in the field of vibration and noise reduction of ships and other engineering structures. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：197 / 204+234
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