含复杂声边界的圆柱壳结构声振特性研究  

Vibro-acoustic characteristics of cylindrical shells with complex acoustic boundary conditions

作　　者：王威[1] 陈炉云[2] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072 [2]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《振动工程学报》2016年第6期1034-1040,共7页Journal of Vibration Engineering

基　　金：海洋工程国家重点实验室研究基金资助项目(1507)

摘　　要：对复杂声边界内的结构振动-声辐射问题开展了研究。针对同时存在着自由液面和刚性壁面的复杂声边界问题,结合镜像法原理,应用双反射方法推导了复杂声边界条件下的圆柱壳结构远场声压方程式。最后,以直角空间域内的圆柱壳结构为例,进行了结构的声振特性数值计算。在算例中,对比了声边界特性、频率及与声边界的距离对声辐射功率、声辐射指向性的影响。研究成果为解决含复杂声学边界的声振问题提供了参考。The structural vibro-acoustic problem with complex acoustic boundaries is studied in this paper. According to the characteristic of acoustic boundary condition which combination free interface and rigid wall interface at the same time, the double reflection method and mirror image method are applied, and the expression function of the acoustic radiation function for the cylindrical shell structure is derived. Finally, the acoustic radiation characteristics of an infinite cylindrical shell structural in a quarter-infinite domain and numerical simulations are compared to illustrate the effects of the acoustic boundary characteristic, location, and radiation frequency on acoustic radiation power and acoustic radiation directivity. This study provides a new method to analyze the acoustic radiation problem with complex boundaries.

关 键 词：声辐射 圆柱壳 双反射法 复杂声边界 

分 类 号：TB532[理学—物理] O327[理学—声学]