Resonances in 1-3 piezocomposite rings

Analysis of 1-3 piezocomposite and homogeneous piezoelectric rings for power ultrasonic transducers

“…However, as the internal and external diameters are of the same order of thickness, there is a coupling between the thickness mode and the undesirable radial and wall thickness modes. This produces degradation of the transducer and has a negative influence on its performance (Yao and Bjorno, 1997;Or and Chan, 2001;Chong et al, 2005).…”