针对传统点源球面扩展声传播模型在结构噪声源识别空间分辨率低的问题，提出基于振声传递矩阵的广义逆波束形成方法（VATM-GIB）。基于结构共型活塞辐射声场解析表达式，建立结构表面振动到辐射声场的振声传递矩阵，克服了传统点源球面扩展声传播模型的局限性；根据广义波束形成基本理论，利用Tikhonov正则化方法，实现对传递矩阵求逆。最后，利用VATM-GIB方法实现了对矩形板结构噪声源的识别。理论分析与仿真结果表明，VATM-GIB方法相较于基于点源格林函数传递矩阵广义逆波束形成方法（GFTM-GIB），具有更高的空间分辨率，有效提高了矩形板结构声源的识别定位性能。
A generalized inverse beamforming method based on transfer matrix was proposed to solve the problem of the low spatial resolution of the traditional point source spherical extended sound propagation model in the noise source identification of structures. Firstly, the transfer matrix from surface vibration to radiated sound field was established by using the expression of the radiated sound field of the rectangular piston. Secondly, according to the basic theory of generalized inverse beamforming, the inverse of transfer rectangle is realized by using Tikhonov regularization method. Finally, the method is used to identify the noise source of rectangular plate. Simulation results show that the generalized inverse beamforming method based on vibroacoustic transfer matrix has better spatial resolution than the rectangular generalized inverse beamforming method based on point source Green's function, and effectively improves the identification and location performance of rectangular plate structure noise sources.
2022,44(17): 29-32 收稿日期：2021-10-08
DOI：10.3404/j.issn.1672-7649.2022.17.006
分类号：TB561
作者简介：徐仲恩(1993-)，男，硕士，助教，研究方向为舰船减振降噪
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