转动压电陶瓷体表面声波的存在性及波速特征关系

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。结果表明：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。

EXISTENCE AND CHARACTERISTIC RELATION OF WAVESPEED TO SURFACE ACOUSTIC WAVES ON A ROTATING PIEZOELECTRIC HALF-BODY

This paper is to display existence and its conditions to a surface acoustic wave propogating along surface of a half-body of piezoelectric ceramics with a rotation of constant angular velocity. It is found that when the half-body rotates, whether or not a surface acoustic wave, which corresponds to either the Rayleigh wave or the Bleustein-Gulyaev wave on the surface of the half-body without rotation, exists is dependent upon those material parameters of the piezoelectric body. If a surface acoustic wave exists when the piezoelectric body rotates, the results exhibit that the surface wave is dispersive. As an example, finally, some quantitative results of the characteristic relation between the wave speed and the rotation angular velocity are given for the PZT-5H material of piezoelectric ceramics.