Design on Multi-excitation Broadband Tonpilz Transducer

Multi-resonant broadband Tonpilz transducer takes the way of coupling multiple vibration modes, so it broadens frequency band. In this paper, for the development of underwater acoustic signal technology, the equivalent circuit method and the finite element analysis method are used to analyze the performance of the double-excitation source multi-resonant transducer for bending vibration of the front cover plate. The results of these two methods are in good agreement. Moreover, the finite element analysis software ANSYS is employed to investigate triple-excitation source multi-resonant transducer. The results show that the frequency band of the double-excitation source multi-resonant transducer is effectively broadened, and the triple-excitation source multi-resonant transducer undergoes small influence of the mass thickness in its working frequency band. This study may provide reference for design of bandwidth and fluctuation of the multi-resonant broadband transducer.