论文期刊

Design of radial phononic crystal using annular soft material with low-frequency resonant elastic structures




作者: Nansha Gao, Jiu Hui Wu, Lie Yu, and Hang Xin
发表/完成日期: 2016-10-08
期刊名称: Physics Letters A
期卷: Vol.380
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论文简介
Using FEM, we theoretically study the vibration properties of radial phononic crystal (RPC) with annular soft material. The band structures, transmission spectra, and displacement fields of eigenmode are given to estimate the startingand cut-off frequency of band gaps. Numerical calculation results show that RPC with annular soft material can yield low-frequency band gaps below 350Hz. Annular soft material decreasesequivalent stiffness of the whole structure effectively, and makescorresponding band gaps move to the lower frequency range. Physical mechanism behind band gaps is the coupling effect between longor traveling wave in plate matrix and the vibrations of corrugations. By changing geometrical dimensions of plate thickness e, the length of silicone rubber h2, and the corrugation width b, we can control the location and width of the first band gap. These research conclusions of RPC structure with annular soft material can potentially be applied to optimize band gaps, generate filters, and design acoustic devices.