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Affiliation of Author(s):航空学院

Journal:JOURNAL OF THEORETICAL AND APPLIED MECHANICS

Key Words:bandgap property phononic crystal double panel band structure displacement field transmission power spectrum

Abstract:The locally resonant (LR) phononic crystal double panel structure made of a two-dimensional periodic array of a two-component cylindrical LR pillar connected between the upper and lower plates is proposed, and the bandgap properties of the structure are investigated theoretically in this paper. The band structures, displacement fields of eigenmodes and transmission power spectrums of the corresponding 8x8 finite structure are calculated by the finite element method. Numerical results and further analysis demonstrate that a band gap with a low starting frequency and a wide band width is opened by the coupling between dominant vibrations of the pillars and plate modes of the upper and lower plates when the vibration source and the receiver are considered on different sides of the structure. By comparing the band structures and displacement fields of the double panel and those of the single plate with the same parameters, many common characteristics are displayed. Then, the influence of geometrical parameters on the band gap are studied and understood with the help of a simple 'spring-mass' model.

ISSN No.:1429-2955

Translation or Not:no

Date of Publication:2017-10-01

Co-author:Qian, Denghui

Correspondence Author:Shi Zhiyu