厚度振动模态优化设计

Optimum design of the thickness vibration modal

实际工作中,压电陶瓷圆片振子的尺寸是有限的,振子在厚度振动基频处与径向振动高阶模有较强的耦合作用。通过理论计算和有限元仿真分析耦合作用的影响。为优化厚度振动模态,提出在压电圆片振子的中心打孔的方法,用孔径大小来调节径向高阶振动频率。实验证明压电圆片振子在中心打孔对优化厚度振动模态有效。

In actual work, the dimension of PZT piezoelectric ceramics disks is limited. There is a strong coupling be- tween the fundamental frequency of thickness vibration and the higher order modes of radial vibration. In this paper, the impact of coupling is analyzed by theoretical calculation and finite element simulation. In order to optimize the thickness vibration, this paper presents a drilling method at the disk center to adjust the frequency of high order radial vibration by pore size. Experiments show the effectiveness of the drilling method for optimizing the thickness vibration mode.