HARMONIC OSCILLATIONS OF PIEZOELECTRIC ELECTROMECHANICAL CONVERTERS OF THE RING FORM WITH AZIMUTHAL SECTIONS OF ELECTRODES

Abstract

In piezoelectric vibrators of circular configuration, the own forms of axisymmetric vibrations, starting from the second natural frequency, have nodal concentric circles. Due to the emergence of zones of tension and compression decreases the efficiency of electromechanical communication. In order to avoid such a drawback, it has been proposed to cut the electrode coating in nodal concentric circles. Published theoretical studies in this direction do not provide sufficient information for analyzing this phenomenon, which resulted in the research outlined in this article.

The general solution of problem electromechanical vibrations of piezoceramic ring plate is obtained. For the plates with radial cuts of electrode covering and for boundary conditions rigid clamping - free edge, free edge - rigid clamping e the spectra of natural frequencies of vibrations are mode shapes for the first harmonics in the circumferential coordinate are identified are numerically determined and analyzed.