组合边界对圆柱壳结构输入功率流的影响特性研究

针对流场中具有组合声边界的圆柱壳结构的声振问题进行了研究。因自由液面和刚性壁面的受控空间内的圆柱壳结构声振问题同时存在,结合镜像法原理,应用双反射方法推导了具有受控声边界条件的圆柱壳结构运动控制方程。以直角空间域内的圆柱壳结构的受迫振动为例,开展了圆柱壳结构的输入功率流特性计算;对比了圆柱壳结构声边界特性、频率及位置对圆柱壳结构输入功率流的影响。

Effects of combined boundaries on input power flow characteristics of cylindrical shells

Here, vibro-acoustic problems of cylindrical shell structures with combined acoustic boundaries in a flow field were investigated. Aiming at the vibro-acoustic problem of a cylindrical shell structure in a controlled spatial domain where there exist simultaneously a free liquid surface and rigid wall ones, the double reflection method combined with the principle of the mirror image method was used to derive the governing equation of motion for the cylindrical shell structure with controlled sound boundaries. Finally, the forced vibration of a cylindrical shell structure in a quarter space was taken as an example to calculate input power flow characteristics of the cylindrical shell structure. The effects of different acoustic boundaries,characteristics, frequencies and locations of the shell structure on its input power flow were compared.