Finite element analysis of a broadband highly sensitive hydroacoustic transducer
A broadband highly sensitive hydroacoustic transducer was designed for applications such as micro-target detection and underwater localization in sonar systems.Bimetallic plate piezoelectric ceramic column array material was used as the sensitive element of the transducer.Air was used instead of polymer and metal plates were bonded to the upper and lower surfaces of the piezoelectric ceramic column array to improve the effective electromechanical coupling coefficient of the material,resulting in improved sensitivity of the transducer.By nested stacking of sensitive elements with different thicknesses,the working bandwidth of the transducer was expanded.The resonant frequency of the bimetallic plate piezoelectric ceramic array material was theoretically analyzed;the dimensional parameters and material selection of the sensitive element were determined by using finite element simulation,and the transducer composed of sensitive elements of this structure was simulated and tested in water.The results show that the working bandwidth of the transducer reaches about 80 kHz,with a maximum transmit voltage response of 188.6 dB,a-3 dB bandwidth of about 74 kHz,and a maximum receive sensitivity of-173.9 dB.Compared with pure piezoelectric ceramics of the same size,the receiving sensitivity and bandwidth of this transducer have been effectively improved.
bimetallic plate piezoelectric ceramic column array materialhigh sensitivitybroadbandfinite element
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维普
