基于互易关系的混响载荷建模方法研究

The modeling method of reverberant load based on the reciprocity relationship

针对混合声振建模问题提出了一种考虑声腔几何形状的混响载荷建模方法。该方法基于互易关系将声腔的混响声压转换为结构表面的等效混响载荷,并考虑声腔的几何边界,可提高建模的准确性。该方法可省略对复杂的外混响声腔进行细节建模,因此能够简化建模过程并提高分析效率。典型系统的算例分析表明,该建模方法是有效的,能够考虑不同声腔边界对结构声振响应的影响。

A reverberant load modeling method with the consideration of the geometry boundary is presented for the hybrid vibro-acoustic modeling process. Based on the reciprocity relationship, the equivalent reverberant acoustic load is obtained from the pressure in the reverberant cavity, and the geometry boundary of the cavity is considered in the modeling process to guarantee the modeling precision. Without the need to consider the modeling detail of the complex exterior reverberant cavity, the modeling process is simplified and the analysis efficiency is improved. The simulation results of a typical system show that this modeling method is valid, and the effect of the geometry boundary on the vibro-acoustic analysis can be duly considered.