中文摘要：

基于周期性声学栅修饰的二维声子晶体,本文从理论上计算其能带结构、等频率色散线,详细讨论引入周期性声学栅后晶体相空间的各种改变。计算结果表明：周期性声学栅的引入能够灵活调制声子晶体的色散关系,更加有效地利用晶体中存在的各种模式,由此可以实现一些较为新颖的声波人工操控。

英文摘要：

Based on two-dimensional sonical crystals（ SC） with periodic acoustic gratings,the band structure and equivalent frequency contours are calculated,and the variety changes of the phase space are discussed. The calculated results show that the dispersion relation of two-dimensional sonical crystals can be easily modulated by using the periodic acoustic gratings and all modes which exist in sonical crystals can be utilized effectively. By using our theoretical results,some novel artificial manipulations of acoustic waves are achieved.