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弯曲圆盘驱动的双Helmholtz共振腔换能器
引用本文:桑永杰, 蓝宇, 刘茂伊. 弯曲圆盘驱动的双Helmholtz共振腔换能器[J]. 声学学报, 2019, 44(6): 1068-1073. DOI: 10.15949/j.cnki.0371-0025.2019.06.013
作者姓名:桑永杰  蓝宇  刘茂伊
作者单位:1. 哈尔滨工程大学 水声技术重点实验室 哈尔滨 150001;
基金项目:国家自然科学基金项目(11304057)水声技术重点实验室稳定支持课题项目(JCKYS2019604SSJS004)资助
摘    要:使用双面同相振动的弯曲圆盘换能器驱动双Helmholtz共振腔,既放大了弯曲圆盘换能器弯曲共振频率以下频段的声输出,又利用两个Helmholtz共振腔的同相声源辐射模型实现了在Helmholtz共振频率处的

关 键 词:Helmholtz水声换能器  弯曲圆盘  指向性  Helmholtz共振腔
收稿时间:2019-06-24
修稿时间:2019-07-16

Dual-Helmholtz resonator transducer driven by flexural disc
SANG Yongjie, LAN Yu, LIU Maoyi. Dual-Helmholtz resonator transducer driven by flexural disc[J]. ACTA ACUSTICA, 2019, 44(6): 1068-1073. DOI: 10.15949/j.cnki.0371-0025.2019.06.013
Authors:SANG Yongjie  LAN Yu  LIU Maoyi
Affiliation:1. Acoustic Science and Technology Laboratory、Harbin Engineering University, Harbin 150001;2. Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001;3. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001
Abstract:An underwater acoustic transducer with dual-Helmholtz resonator is presented.The acoustic output of flexural disc transducer below its resonant frequency can be amplified by Helmholtz resonators,the "∞" beam pattern can be obtained due to in-phase radiation of two Helmholtz resonators.Thus,the transducer has the characteristic of low frequency directional transmitting which is difficult for low frequency,small size transducers.The principle of achieving directivity for the low frequency transducer is described.Finite element model is modeled by ANSYS software for studying its acoustic performance.The influence of key structural parameters such as the length of cavity,the thickness of metal disc in flexural disc transducer and the thickness of simply supported structure on Helmholtz resonant frequency have been investigated.The transmitting voltage response and directivity are solved.The prototype is fabricated based on simulation dimension result,transmitting voltage response and directivity are tested in anechoic tank.Test results revealed that the transducer has "∞" vertical directivity at Helmholtz resonant frequency,the beam pattern and Helmholtz resonant frequency are in good agreement with simulation results.The transducer presented in this paper can provide technical support for low frequency directional transmitting with small size. 
Keywords:Helmholtz underwater acoustic transducer  flexural disc  directivity  Helmholtz resonator
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