The Research Of End Driven Bender Beam Transducer

With the increasing attention of people to the ocean,the application field of underwater acoustics is increasing,and the demand for military confrontation is increasing,and underwater acoustic transducers have the development trend of low frequency,small size and high power.In view of the problems of the classic three layers transducer,this paper proposes an end driven bender beam transducer to achieve good low-frequency acoustic radiation ability of the transducer by using the displacement amplification structure.This paper first designs the end driven bender beam transducer for the problems existing in the classical bending transducer,and explains the basic structure and working principle of the transducer.The displacement amplification structure and broadband effect of the end driven bender beam transducer are analyzed,which proves that the transducer has the outstanding advantages of displacement amplification and gentle undulation in the band.Secondly,the finite element simulation software is used to simulate and analyze the transducer,the finite element model of the transducer is established,the vibration mode,admittance characteristics and emission voltage response of the transducer are analyzed,the influence of various dimensional parameters of the transducer structure on the performance of the transducer is analyzed,and the optimal simulation prototype of the transducer is designed.According to the simulation results,the end driven bender beam transducer was designed and manufactured,and the admittance characteristic test and the emission voltage response test were carried out on the actual transducer.The test results show that the transducer has good low-frequency emission performance,which verifies the feasibility of the terminal drive structure.Finally,based on the basic structure of the end driven bender beam transducer,two improved structures are proposed,namely the fishlip transducer and the multi-faceted radiation transducer,which increase the radiation area of the transducer from different angles andimprove the emission performance of the transducer.Optimized prototypes of transducers with different structures were designed.The improved end driven bender beam transducers have good low-frequency emission performance.