二维声子晶体板的声波能带结构

采用基于超元胞的平面波展开法研究了二维声子晶体板的声波能带结构，分析了二维声子晶体板的几何参数(板的厚度,圆柱体的半径和高)对声波能带的影响.研究结果表明：该声子晶体具有更优的带隙，带隙的调节机制更为简单，超元胞法是研究这一类声子晶体能带结构的一种有效方法.

Band Structure of Two-Dimension Phononic Crystal Plate

By using the super cell method,the authors calculat the acoustic wave band structure of the phononic crystal which consist of periodical array of steel cylinders  growing on the both sides of the steel plate symmetrically in epoxy.The influence of the geometric parameters of the scatterer (the thickness of the board,the radius and height of the cylinder) on the band structure is analyzed.The calculated results indicate that this kind of phononic crystal has a more superior wide band gaps.The adjustment mechanism of band gap is much more convenient than that of the traditional phononic crystal.It is also found that the super cell method is an effective method to investigate the band structure of this kind of phononic crystal.