【作者】 李双； 靳海水； 何继访；

【Author】 LI Shuang1、2, JIN Hai-shui2,He Ji-fang2 (1.College of Marine, Northwestern Polytechnical University, Xi’an 710072, China; 2. R&D Center,Shanghai Hitachi Electrical Application Co., Ltd, Shanghai 210216, China)

【机构】 西北工业大学航海学院； 上海日立电器有限公司；

【摘要】 将振动模态和声辐射模态有机结合起来对结构声辐射进行分析,分别确定结构声辐射中自辐射效率和互辐射效率都较高的"优势振动模态"及不同频率下对总辐射声功率起主要作用的"主导声辐射模态",然后对"主导声辐射模态"或"优势振动模态"进行主动控制,从而有效降低结构的总辐射声功率。更多还原

【Abstract】 structural vibration modes and acoustic radiation modes are combined to investigate sound radiation from a vibrating structure and two key issues are solved: 1) the preponderant vibration modes are determined based on assessing of the effects of structural modal coupling on the total radiated sound power; 2) the dominant radiation modes corresponding to different structural vibration modes or frequencies are determined. The total sound power radiated from vibrating structure would be reduced effectively when the preponderant vibration modes or dominant radiation modes are controlled.更多还原