【摘要】 声子带隙产生条件是声子晶体研究的一个重要问题,首先对钢圆柱体嵌入空气基质组成的声子晶体散射截面进行计算,然后用平面波方法计算了弹性波带结构。结果表明声子带隙将出现在两个完全分离的共振态之间。因此,声子晶体产生完全带隙的条件是弹性波在基质材料中的传播被禁止并远离共振。更多还原

【Abstract】 The emergent conditions of phononic band gaps are important problem to phononic crystal studying, We calculate the scattering cross section of steel cylinders embedded in air with periodic array, by using the plane waves expansion method, the elastic waves band structure are calculated. The results indicate that phononic band gap appear in frequency regions between two well separated resonance states. The gaps should appear at frequencies: such that the propagation along the host material is inhibited and far away from resonance.更多还原