基于波叠加法的声辐射阻计算研究

机械结构的声辐射功率直接表征了结构向外辐射的声能量，而结构表面声辐射阻则反映了该结构向外辐射声能量的能力。文章基于波叠加法，研究声场的声压、源强度和表面法向振动速度之间的关系，推导了结构声辐射阻矩阵。针对典型的声学结构，计算了其表面辐射阻。根据声辐射阻定义，设计了声辐射阻的测量装置，通过实验验证了理论计算方法的正确性。且对一般复杂结构，研究了结构声反射及共振对声辐射阻的影响。

Research on the acoustic radiation resistance calculation based on wave superposition method

The radiation sound power is defined as the energy radiated from the structure boundary surface, while the radiation resistance represents the radiation ability of vibrating structure. This paper calculates structure acoustic radiation resistance with the relationship of field pressure, source amplitude and normal velocity of boundary surface based on wave superposition method. The radiation resistance testing equipment is designed according to the concept of radiation resistance. Then the radiation resistance of typical structure is computed and verified by experiment testing. The acoustic reflections and resonances influence on the re-sistance is researched for more complicated structure.