有源声学结构次级声源的布放规律研究  

Optimized Arrangement of Secondary Sound Sources for an Active Acoustic Structure

作　　者：李双[1] 陈克安[1] 

机构地区：[1]西北工业大学航海学院环境工程系,西安710072

出　　处：《机械科学与技术》2006年第11期1351-1357,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(10274060);西北工业大学博士论文创新基金项目(CX200502)资助

摘　　要：有源声学结构是近年来提出的一种控制结构低频声辐射的有效方案,它是智能结构在有源噪声控制领域的具体应用。次级声源的优化布放是有源声学结构研究中的核心问题,本文对此进行了研究。首先建立了有源声学结构的计算模型,然后基于声辐射模态和结构振动模态理论,推导总结出各种情况下次级声源的最优布放规律,最后用一系列的计算机仿真实例对该规律进行了验证。An active acoustic structure, which is an instance of application of intelligent structures to noise control, is a recent and effective approach to the control of structural low-frequency sound radiation. One of the core issues in the study of active acoustic structures is the optimized arrangement of secondary sound sources. Firstly the paper sets up its calculation model, and then arrives at the laws of their optimized arrangement under various conditions through using the sound radiation module and structural vibration module. Finally a number of computer simulation instances verify the validity of the laws.

关 键 词：有源噪声控制 有源声学结构 声辐射模态 振动模态 

分 类 号：TB53[理学—物理]