Finite Element Analysis of Cymbal Transducer from Porous Piezoceramics PZT-4 with Various Material Properties

摘要

The chapter deals with the finite element modeling of the disk piezoelectric transducer with cymbal-shaped end-caps. Under radial oscillations of piezoceramic disk this transducer generates axial oscillations with large amplitude thanks to more flexible metal end-caps. One of the factors contributing to the efficiency of trans formating radial displacement into axial is the value of the transverse piezomodulus of the piezoceramic material. As it was recently found, porous piezoceramic with fully metallized pore surfaces exhibits a growth of the transverse piezomodulus with the porosity growth unlike ordinary piezoceramics, where the transverse piezomodulus decreases under the growth of porosity. This work investigates the oscillations of the cymbal piezoelectric transducer with the disk made of porous piezoceramic with fully metallized pore surfaces for various percentage of porosity. The results of the numerical experiments have confirmed the prospects of using new types of piezoceramic materials for a cymbal transducer.