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The method of identification of the planar noise source based on source strength acoustic radiation modes
Author(s): 
Pages: 539-546
Year: Issue:  4
Journal: Journal of Vibration Engineering

Keyword:  noise source identificationsource strengthacoustic radiation modessound field distribution modes;
Abstract: 为了解决噪声源识别中存在的识别精度不高、分辨率受限、对测量条件要求高等问题,提出了基于源强声辐射模态的噪声源识别方法.该方法首先计算结构的源强声辐射模态矩阵和声场分布模态矩阵,然后利用声场中测得的声压数据向量与结构声场分布模态矩阵的关系求出声辐射模态展开系数向量,最后通过声辐射模态矩阵和声辐射模态展开系数向量的积就可得到结构的源强分布,从而达到对噪声源识别的目的.该方法利用较少的测量点可以获得较高分辨率和识别精度.通过平板振动仿真和音箱实验验证了该方法对平面结构噪声源识别的有效性.
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