Bending vibration analysis of the circular composite piezoelectric vibrator

In order to find the optimal performance of the fixed-edge double-layer piezoelectric Unimorph flexural transducer,the relationship between the resonance frequency,the effective electromechanical coupling coefficient and size of the piezoelectric actuator are calculated and analyzed,the optimum design of geometric parameters is obtained.The result shows that the geometric parameters change is very great influence to the transducer resonance frequency and the effective electromechanical coupling coefficient,when the thinckness ratio α and the radius ratio β are 0.49 and 0.71 respectively,the effective electromechanical coupling coefficient reaches its maximum value 0.31.