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所属单位：航空学院
发表刊物：JOURNAL OF THEORETICAL AND APPLIED MECHANICS
关键字：bandgap property phononic crystal double panel band structure displacement field transmission power spectrum
摘要：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号：1429-2955
是否译文：否
发表时间：2017-10-01
合写作者：Qian, Denghui
通讯作者：史治宇