Three-dimensional vibration analysis of the split electrode vibrator using finite element method

In this paper, ANSYS based on the finite element method is used to investigate the effects of geometry and electrodes of a split thin piezoelectric ceramic strip on its resonant frequencies and conductance related to the sensitivity. Our numerical results show that the fundamental frequencies decrease as the vibrator length and width increase. And it is mainly influenced by the longest dimension of the vibrator. As for the split electrode vibrator, when the electrode area decreases, the resonant frequencies will increase while the conductance decreases. The order of resonant frequencies corresponding to the highest conductance is equal to the number of electrodes in the vibration trip. So the way of splitting electrode can increase the vibrator sensitivity. Our numerical results are in agreement with the existing theoretical result for the simplified model. This work will give some insights for the design of high-frequency and high-performance transducer.