基于声辐射模态的耦合封闭声腔有源结构声控制机理  

Mechanisms of active structural acoustic control based on acoustic radiation mode of coupling enclosure

作　　者：张江平 王亚楠 姜涛 张光宇 ZHANG Jiang-ping;WANG Ya-nan;JIANG Tao;ZHANG Guang-yu(Teaching and Research Support Center,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学教研保障中心,武汉430033

出　　处：《海军工程大学学报》2021年第3期38-42,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51675529)。

摘　　要：利用声辐射模态进行有源结构声控制(ASAC)是一种全新有效的结构声控制方法。为此,结合结构模态和声模态,研究了基于声辐射模态的ASAC机理。研究结果表明:基于声辐射模态的ASAC机理在于大幅降低主导声辐射模态幅度;从结构模态的角度来看,板控模态频率下的结构模态幅度出现模态抑制,而腔控模态频率下则发生模态重组;从声模态角度来看,同时降低了与该阶主导声辐射模态耦合的一组声模态幅度,从而实现了声势能衰减和全局降噪。Active structural acoustic control(ASAC)based on acoustic radiation mode(ARM)is a new and effective method in structural acoustic control field.In combination with structural modes of elastic structure and acoustic modes of acoustic enclosure,control mechanisms of ASAC based on ARM of coupling enclosure were studied.Some research results were drawn as follows:Control me-chanisms of ASAC based on ARM of weak coupling enclosure relies on the control of dominant ARMs;for the structure modes,mode suppression and mode reconstruction occur at structural modal frequencies and acoustic modal frequencies respectively;for the acoustic modes,the acoustic modes coupled to the dominant ARMs are suppressed drastically,and the acoustic potential energy is reduced for the whole space.

关 键 词：耦合封闭声腔 声辐射模态 有源结构声控制 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]