复合共鸣腔Janus宽带换能器  

A broadband Janus transducer with composite cavities

作　　者：伊子旭 莫喜平[1] 柴勇[1,3] 刘永平 YI Zixu;MO Xiping;CHAI Yong;LIU Yongping(Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China;Beijing Engineering Technology Research Center of Ocean Acoustic Equipment,Beijing 100190,China)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100190 [3]北京海洋声学装备工程技术研究中心,北京100190

出　　处：《声学技术》2021年第2期282-285,共4页Technical Acoustics

基　　金：国家自然科学基金项目(11874387);国家自然科学基金青年科学基金(11804367)。

摘　　要：提出了一种复合共鸣腔Janus换能器设计思想。在Janus-Helmholtz换能器基础上,增加Janus-Hammer Bell的圆环谐振模态,利用换能器三种工作模态的互相耦合,有效拓宽了换能器的工作频带。同时换能器整体采用溢流设计,实现内外静水压力平衡,适用于深水工作。文章首先介绍了复合共鸣腔的工作原理,给出了圆环模态谐振频率的近似估算公式,通过与有限元方法结果对比证明了近似公式的有效性。利用有限元方法对换能器进行了结构优化,并根据优化结果制作了实验样机。最终测试的结果与仿真结果呈现了很好的一致性。An idea of designing broadband Janus transducer with composite cavities is presented in this paper.Based on the Janus-Helmholtz transducer,the ring resonant mode of Janus-hammer bell is added,and the working bandwidth of the transducer is effectively widened by mutual coupling of three transducer working modes.Moreover,the free-flooded design of whole transducer is adopted to achieve internal and external hydrostatic pressure balance,which is suitable for working in deep water.The working principle of the composite resonance cavity is introduced at first,and then an approximate estimation formula of the resonance frequency of ring mode is given.The validity of the approximate formula is proved by comparison with the results of the finite element analysis.The structure of the transducer is optimized by the finite element method,and an experimental prototype is prepared according to the optimization results.The final test results are in good agreement with the simulation results.

关 键 词：复合共鸣腔 谐振频率 有限元分析 圆环模态 

分 类 号：TB565.1[交通运输工程—水声工程]