【摘要】 针对失谐压电周期结构中的弹性波局部化问题进行了研究。采用传递矩阵法推导了结构中相邻单胞间的传递矩阵,给出了结构中波动局部化因子的表达式,并给出了数值算例,分析了压电材料各参数对局部化因子的影响。分析表明,结构的失谐度和压电常数越大,波动局部化程度越强;可以通过调谐结构的材料特性来改变弹性波的局部化程度,从而改变波动在结构中的传播特性,达到对结构进行有效振动控制。更多还原

【Abstract】 Localization of elastic waves in periodic piezoelectric structures is studied. The method of transfer matrix is used to obtain the transfer matrix between two consecutive unit cells in the structure. The expression of localization factor is given by Wolf algorithm, numerical examples are presented and the effects of various parameters of piezoelectric material on localization factor are analyzed. It can be seen that for the different material properties the characters of frequency band and the degree of localization in the structure are very different. By tuning the material properties of the structure, the degree of the localization can be changed. So, the characters of wave propagation in the structure can be changed.更多还原