【摘要】 提出一种层厚递变式一维准周期结构声子晶体模型,数值计算了弹性波通过该一维准周期结构声子晶体的透射系数,并与周期结构声子晶体的透射系数进行了比较.计算发现,利用准周期排列的特殊结构可以有效地调节声子晶体的带隙宽度和所在的频率范围.更多还原

【Abstract】 A model of one-dimensional phononic crystal with quasi-periodical structure,in which the layer thickness can be changed gradually,is proposed.The transmission coefficients of the elastic waves through the quasi-periodical phononic crystal have been numerically calculated,and been compared with the transmission coefficients of periodical phononic crystal.The numerical results show that the width and the frequency location of the band gap of phononic crystal can be adjusted by utilizing the special quasi-periodical structure.更多还原