The identification of rezonance eigenfrequencies for multicomponent ultrasonic actuators

Abstract

Piezoelectric actuators operate in resonance mode and in order to achieve the desired modal shape, it's necessary to obtain exact dislocation of excitation zones. The optimal electrodes configuration gives an opportunity to reduce the concentration of mechanical stresses. Numerical experiments of the multicomponent ultrasonic actuators show that modal shapes sequence depends on the geometrical parameters of the actuator. The exchanges in the modal shape sequence are a general case problem concerning not only piezoelectric actuators, but also with all mechanical structures The exchanges in the modal shape sequence prevents automation of solving different problems. For this reason an improved algorithm for solving the problems related to the changes in the modal shape sequences has been proposed in the paper, also, the dependence of eigenfrequencies on various parameters of multicomponent piezoelectric actuators and problems related with the exchanges in the modal shapes sequence has been analyzed.