双激励宽带水声换能器理论研究

如何有效提高水声换能器的工作带宽一直是水声界关注的热点，本文从理论上探讨了一种拓展水声换能器带宽的方法，对该类型水声换能器带宽影响较大的因素进行了详细的分析。仿真结果表明，通过调整中间质量块和后质量块的材料与尺寸可以有效地改善换能器的发射电压响应带宽。比较了有限元方法与传统一维（1D）等效电路方法，结果表明，传统1D等效电路方法也可以用来设计这种换能器，同时给出了设计该型宽带换能器的规律，对换能器设计人员有一定的参考价值。

Theoretical Study on Broadband Underwater Transducer with Double Resonant Mode

A method that can broaden the band of the underwater transducer is theoretically discussed. The factors that affect the band of transducer are analyzed. The simulations by using finite element method (FEM) show that the response band of transmitting voltage can be improved effectively by changing material and size of the middle mass or back mass. The comparison of the results of FEM and the traditional one dimensional equivalent circuit method demonstrates that the latter method can also be used to design this type of transducer. Some laws in designing this type of broadband transducer summarized.