对转动半无限压电陶瓷体的表面声波给出了存在性证明及其条件.结果发现:对应于不转动时的Rayleigh表面声波与Bleustein-Gulyaev表面声波在转动情形是否仍为表面波有赖于压电体的材料参数;如果转动时表面声波存在,则这些表面声波是色散的.最后,以PZT-5H压电陶瓷材料为例定量给出了波速－转动角速度的特征曲线.%This paper is to display existence and its conditions to a surfaceacoustic wave propogating along surface of a half-body of piezoelectricceramics with a rotation of constant angular velocity.It is found that when the half-bodyrotates, whether or not a surface acoustic wave,which corresponds to either the Rayleigh wave orthe Bleustein-Gulyaev wave on the surfaceof the half-body without rotation, exists is dependent upon thosematerial parameters of the piezoelectric body. If a surface acousticwave exists when the piezoelectric body rotates, the results exhibitthat the surface wave is dispersive. As an example, finally,some quantitative results of the characteristic relation between thewave speed and the rotation angular velocity are given forthe PZT-5H material of piezoelectric ceramics.
展开▼
