三维声子晶体带隙与散射体取向的关系

The Relation Between Scatterer's Tropism and Band Gaps of 3D Phononic Crystal

研究了散射体的取向对二组元三维声子晶体带结构的影响.应用平面波展开法计算了3种结构的三维声子晶体的带结构,结果表明:通过改变散射体的取向可以调节带隙大小,对于简立方和面心立方结构的声子晶体,最低带隙宽度随着散射体的旋转角的增加而减小,而对体心立方结构的声子晶体,最低带隙宽度随着散射体旋转角的增加而增加.

This paper investigates the influence of scatterer＇ s tropism on band gaps of 3D phononic crystal. By using the plane wave expansion method, the authors calculated the band structure of 3D phononic crystals with the three structures. The results show that the band gaps can be adjusted by changing the scatterer＇s tropism. For Simple-Cubic （SC） and Face-Centered-Cubic （FCC） structure the lowest band gap width becomes narrower, while for Body-Centered-Cubic （BCC） structure the lowest band gap width becomes wider as the rotation angle of the scatters increases.