摘要
声辐射模态和声场分布模态分别描述了复杂振动表面的辐射模式和声场的分布模式。通过数值计算,揭示声辐射模态和声场分布模态的物理含义。针对球形声源、旋转体声源和立方体声源,给出了声辐射模态和声场分布模态的几何图案。第一阶模态表示单极子辐射行为,第二阶到第四阶模态表示偶极子辐射行为,第五阶到第九阶模态表示四极子辐射行为。声辐射模态和声场分布模态将多极子分解方法应用于复杂声源声辐射问题的讨论。
The acoustic radiation modes and the field distribution modes describe the radiation patterns of a complex vibrating surface and the field distribution patterns respectively. The physical meanings of the acoustic radiation modes and the field distribution modes are revealed by numerical method. For a sphere body, a spinning body and a rectangular body, the geometrical patterns of the acoustic radiation modes and the field distribution modes are given. The radiation mode 1 represents the radiation behavior of a monopole radiator, the radiation modes 2 through 4 represent the radiation behavior of dipole radiators respectively, and the radiation modes 5 through 9 represent the radiation behavior of quadrapole radiators respectively. The acoustic radiation modes and the field distribution modes introduce the multi-pole decomposition method into discussion of the acoustic radiation problems.
出处
《声学学报》
EI
CSCD
北大核心
2004年第6期507-515,共9页
Acta Acustica
基金
国家自然科学基金资助项目(50075036)
