多模耦合宽带Ⅳ型弯张换能器  

Multimode coupling wideband class-Ⅳ flextensional transducer

作　　者：卢苇 叶皓棠[1,2,3] LU Wei;YE Haotang(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001;Key Laboratory of Marine Information Acquisition and Security,Harbin Engineering University,Ministry of Industry and Information Technology,Harbin 150001;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]工业和信息化部海洋信息获取与安全工信部重点实验室(哈尔滨工程大学),哈尔滨150001 [3]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《声学学报》2025年第1期149-156,共8页Acta Acustica

基　　金：国家自然科学基金项目(12074090)资助。

摘　　要：为拓展水声换能器的工作带宽,解决多模耦合换能器存在模态耦合效果不佳的问题,利用等效电路法研究了换能器振动模态相位对模态耦合能力的影响,提出了换能器振动模态相位的获取和调控以及提升模态耦合能力的方法。重点分析了Ⅳ型弯张换能器一阶、二阶振动模态的相位特点,提出在换能器椭圆壳体上增加空腔结构以调整二阶弯张振动模态相位,从而构建利用一阶、二阶弯张振动模态耦合实现宽带发射的宽带Ⅳ型弯张换能器。制作了宽带Ⅳ型弯张换能器样机,其工作带宽覆盖2~7 kHz,实现了一阶弯张振动模态与二阶弯张振动模态的有效耦合,验证了所提方法的有效性。In order to extend the working band of the underwater transducer and to solve the problem of poor coupling of some modes in the multimode coupling transducers,the effect of the phase in the vibration modes of the transducer on the modal coupling capability is studied by using the equivalent circuit method.The methods for obtaining and controlling the phases in vibration modes and improving the coupling capability are presented.The phase characteristics of the first and second order vibration modes of the class-Ⅳ flextensional transducer are mainly analyzed.A cavity structure can be added to the ellipsoidal shell of class-Ⅳ flextensional transducer to adjust the phase of the second order vibration mode in the flextensional transducer,thus constructing a wideband class-Ⅳ flextensional transducer by using the coupling of the first and second order flexural tension vibration modes.A prototype of a wideband class-Ⅳ flextensional transducer is fabricated with a working band of 2–7 kHz.The effective coupling of the first order and the second order flexural tension vibration modes is realized,and the effectiveness of the proposed method is verified.

关 键 词：多模耦合 等效电路法 振动模态 Ⅳ型弯张换能器 

分 类 号：TB565.1[交通运输工程—水声工程]