Research on 1-3 piezocomposite broad-band underwater transducers

There are many advantages of 1-3 piezocomposite transducers,such as lighter weight,lower specific acoustic impedance.The matching layer is commonly used to expand the bandwidth of composite transducers.A 1-3 piezocomposite transducer is studied with thickness-mode oscillations model,lateral-mode model and finite element method.The finite element modal of transducer is set up with ANSYS software and the structure of the transducer is optimized.A final 1-3 piezocomposite transducer is designed,which used the thickness mode and the first lateral-mode.The bandwidth of the transducer is 190～390 kHz,in which the ripple of the transmitting voltage response does not exceed±2 dB. There are several conclusions from the research:The bandwidth of 1-3 piezocomposite transducers can be expanded by the thickness mode and the first lateral-mode,and it gives a method to achieve the broad-band projecting performance of high-frequency transducer.