摘要
采用平面波展开法,分析了一类声阻抗较大的圆柱体正方形周期排列在空气中形成的二维声子晶体声波禁带。数值计算结果表明,在柱体声阻抗远大于基体的条件下,声波禁带与柱体材料及其是否空心无关,而与柱体半径和晶格常数有关。
The band gaps of the two-dimensional phononic crystal composed of square array of cylinders in air are analyzed by the plane-wave expansion (PWE) method. The numerical result shows that the band gaps are independent of the physical parameter of the scatter if the acoustic impedance of the scatter is much greater than that of the matrix. So the band gaps are determined by the radius of the cylinders and the lattice constant. It doesn't matter whether the cylinders are hollow or not.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2004年第4期77-80,85,共5页
Journal of National University of Defense Technology
基金
国家重点基础研究发展规划资助项目(51307)
关键词
声子晶体
声波禁带
基体
品格常数
phononic crystal
phononic band gaps
matrix
lattice constant
