Electro-Elastic Modeling of Annular Piezoceramic Actuating Disk Transducers

The static and dynamic characteristics of the annular piezoceramic actuating disk transducers are theoretically modeled and analyzed. The transducer consists of an annular piezoceramic disk laminated on an unequal radius isotropic elastic disk to form the asymmetric configuration. Piezoceramic actuator excites the transducer in extension and flexure coupled vibrations. An electroelastic theory is developed to analyze the mechanical, electrical and electromechanical behaviors. Resonant and antiresonant frequencies and the electromechanical coupling coefficients are computed and shown sensitive to geometric parameters of the elastic and piezoceramic materials. Numerical results are presented by the easy-to-use figures. Comparisons between experimental measurements of the transducer's resonant and antiresonant frequencies and modeling results exhibit a good agreement.