刚性角隅内圆柱壳结构声辐射特性研究

本文对流场中处于刚性角隅内圆柱壳结构振动-声辐射问题进行研究．基于双反射方法，推导了位于两个垂直刚性壁面角隅区内圆柱壳结构的振动-声辐射方程．以此为基础，开展受线环向激励力作用的圆柱壳结构的振动-声辐射特性的数值计算．研究了刚性角隅内圆柱壳结构布置位置及计算频率对声辐射功率、声指向性的影响．计算结果可为分析含复杂声学边界的结构声振问题提供技术支持．

Vibro-Acoustic Characteristics Analysis of Cylindrical Shells in Rigid Corner

The vibro-acoustic problem of cylindrical shells which location in the rigid corner is investigated. According to the double reflection method, the vibro-acoustic radiation function for the cylindrical shell structure in the rigid corner is derived. The acoustic radiation characteristics of the cylindrical shell structure in the rigid corner domain under linear circumferential excitation loading for example, the numerical analysis are carried out. The influence of the location and frequency for the cylindrical shell on acoustic radiation power and acoustic radiation directivity are compared by numerical analysis. The results provide a technical support for analyzing the structural vibro-acoustic problem with complex acoustic boundaries.