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中文摘要：
声子晶体是一种具有声波带隙特性的新型功能材料。运用平面波展开法研究了二维声子晶体的带结构．二维声子晶体由横截面为正方形的散射体按正方彤排列植入环氧树脂基体中形成。结果表明：通过改变散射体的取向可以调节系统的带隙，当填充率较低时，带隙宽度随散射体旋转角的增加先减小再增加，而填充率较高时，带隙宽度随散射体旋转角的增加而先稍有增加然后再减小。
英文摘要：
Phononic crystal is a novel functional material with acoustic band-gaps. We study the band structure of 2D phononic crystal using the plane wave expansion method. The crystal is composed of a square array of scatterers embedded in an epoxy host, and the scatterers have square cross sections. The results show that the band-gaps of this system can be adjusted by changing the scatterers＇ tropism. When the filling rate is low, with the increase of the scatterers＇ rotation angle, the band-gap width initially becomes narrower and then widens gradually, while at high filling rates, the band-gap width increases slightly at first and then decreases as the scatterers＇ rotation angle increases.
同期刊论文项目
同项目期刊论文
Highly directional acoustic wave radiation based on asymmetrical two-dimensional phononic crystal re
Acoustic directional radiation and enhancement caused by band-edge states of two-dimensional phononi
The layer multiple scattering method for calculating transmission coefficients of 2D phnonic crystal
Subwavelength imaging of acoustic waves by a canalization mechanism in a two-dimensional phononic cr
Point defect states in 2D acoustic band gap materials consisting of solid cylinders in viscous liqui
Negative refraction imaging of solid acoustic waves by two-dimensional three-component phononic crys
Experimental demonstration of directional acoustic radiation based on two-dimensional phononic cryst
Mode-Selecting acoustic filter by using resonant tunneling of two-dimensional double phononic crysta
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