利用声辐射模态对声场进行重构

On reconstruction of acoustic pressure fields using the radiation modes

声辐射模态是定义在振动表面上的一组互相独立的基函数,描绘了振动表面的多极子辐射模式。本文利用声辐射模态对平板辐射的声场进行重构,并同时就频率和模态数对误差的影响进行了分析。针对复杂振动表面幅射的声场,重构时需正则化处理。数值计算结果和对应的理论值达到很好的吻合。

The acoustic radition modes constitute a set of independent basis functions defined on the vibrating surface and describe the radition patterns of multi-pole. This paper presents implementation of reconstruction of acoustic pressure field using acoustic radiation modes and analyzes the error from mode number and frequency. For the complicated radiation of a plate, the regularization method is used, and the numerally calculated results agree with a theoretical results.