声辐射模态在声场重构中的应用

Application of Acoustic Radiation Modes to Acoustic Fields Reconstruction

基于声辐射模态,对辐射声场的重构进行仿真研究,取得了令人满意的结果。声辐射模态包含声源几何形状的影响,利用声辐射模态可实现对任意复杂形状声源的声场重构。声源相对简单时,需要较少的测点数就可以得到很好的重构效果。对于复杂的声源辐射声场,重构中结合正则化方法保证重构的高效性与精确性。同时,探讨通过重构声源表面声压的方法来识别噪声源,经过模拟计算和可视化的实现,表明方法简单可行。

Based on the acoustic radiation modes, the simulation of the reconstruction of acoustic pressure fields is studied. And a satisfactory result is obtained. The acoustic radiation mode contains the affect of the geometrical shape of sound sources. The acoustic fields of arbitrarily shaped sound source can be reconstructed using the acoustic radiation modes. When the sound source is relatively simple, on- ly less measuring points can provide very good results. For the radiation of complex sound source, the regularization method is used to guarantee the accuracy of the reconstruction. Meanwhile, this paper attempts to identify the sound source by reconstructing surface acoustic pressure. After the simulation and visualization processing, the method is found to be simple and feasible.