Analysis of sandwich transducer consisting of multi-pair of piezoelectric ceramics with losses

Abstract

Transducer losses are considered with complex coefficients of piezoelectric ceramics. Equivalent circuits for piezoelectric ceramics with losses and for sandwich transducers with multi-pairs of piezoelectric ceramics are given. A method for measuring the complex coefficients of piezoelectric materials under practical conditions is proposed, and a general program for a one-dimensional composite vibration system with losses is compiled. The theoretical solutions and results of one transducer are compared.<>