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结构声辐射有源控制中主导辐射模态的抵消及次级力的最优布放
引用本文:李双,陈克安.结构声辐射有源控制中主导辐射模态的抵消及次级力的最优布放[J].噪声与振动控制,2006,26(6):62-66,86.
作者姓名:李双  陈克安
作者单位:西北工业大学,航海学院,环境工程系,西安,710072
基金项目:国家自然科学基金;西北工业大学校科研和教改项目
摘    要:在基于声辐射模态理论的结构声有源控制中,主导辐射模态的确定及抵消策略是至关重要的,它直接决定次级力源的优化布放及有源控制的效果。以往研究中对于主导辐射模态的认识是模糊而片面的,现对该问题进行了深入分析。首先基于辐射模态理论和振动模态的叠加性,结合辐射模态幅度和辐射效率,确定了结构在不同的激励频率(振动模态)下对应的主导辐射模态,然后在此基础上对次级力源进行了优化布放,最后用一系列的计算机仿真实例验证了理论结果的正确性。

关 键 词:声学  有源噪声控制  声辐射模态  主导辐射模态  次级力布放
文章编号:1006-1355(2006)06-0062-05
收稿时间:2006-01-09
修稿时间:2006-01-09

Cancellation of Dominant Radiation Modes and Arrangement of Secondary Forces in Active Structural Acoustic Control
LI Shuang,CHEN Ke-an.Cancellation of Dominant Radiation Modes and Arrangement of Secondary Forces in Active Structural Acoustic Control[J].Noise and Vibration Control,2006,26(6):62-66,86.
Authors:LI Shuang  CHEN Ke-an
Abstract:In the active structural acoustic control based on radiation modes, the cancellation of the dominant radiation modes and determination of the arrangement of secondary forces are of virtual important. In this paper, first, the dominant radiation modes corresponding to different structural modes or frequencies are determined according to the radiation efficiency and radiation mode amplitude which is dependent upon the structural and radiation mode shapes. Second, an effective active control strategy and the arrangement of the secondary forces are obtained based on dominant radiation modes. Finally, a number of computer simulations are performed and corresponding reduction in the radiated sound power are achieved. The results demonstrate the feasibility of the proposed active control strategy and arrangement of secondary forces.
Keywords:acoustics  active noise control  radiation mode  dominant radiation mode  arrangement secondary forces
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