基于Abaqus的水下结构声辐射仿真方法  

Simulation method of sound radiation of underwater structure based on Abaqus

作　　者：吴健[1] 李泽成[1,2] 熊晨熙[1] 

机构地区：[1]中国船舶科学研究中心船舶振动噪声国家重点实验室,江苏无锡214082 [2]江苏省绿色船舶技术重点实验室,江苏无锡214082

出　　处：《计算机辅助工程》2015年第6期37-41,65,共6页Computer Aided Engineering

基　　金：江苏省绿色船舶技术项目;国防预研项目(51310030303)

摘　　要：提出一种在Abaqus中直接完成辐射声场仿真的方法,该方法可大大减少流场网格层数.利用无限元的计算结果求解任意远处球形声场的声压;结合弹性球壳的解析解算例验证该方法的正确性,并将该方法拓展到细长型结构中.结果表明:基于Abaqus无限元的水下结构声辐射的计算方法简单、可行;采用有限元与无限元相结合的方法可以大幅度缩小流场区域.A method that the radiation sound field is directly simulated in Abaqus is proposed,by which the mesh layers of flow field can be greatly reduced. The sound pressure of spherical acoustic field at any distance is calculated by the calculation results using infinite elements. The method is validated by comparing with the analytic results of elastic spherical shell and extended into the calculation of slender structures. The result indicates that,the underwater structure sound radiation calculation method based on infinite element of Abaqus is simple and feasible,and the method that combines finite element with infinite element can reduce the fluid domain significantly.

关 键 词：水下结构 声学无限元 声介质 声辐射 球壳 

分 类 号：U674.76[交通运输工程—船舶及航道工程] U661.44[交通运输工程—船舶与海洋工程]