声辐射边界元的数值计算  

Numerical Calculation of the Acoustic Radiation by BEM

作　　者：郭伟[1] 蔡朋[1] 马俊[1] 

机构地区：[1]海军驻431厂军代表室,辽宁葫芦岛125004

出　　处：《船海工程》2011年第1期101-103,共3页Ship & Ocean Engineering

摘　　要：采用有限元与边界元方法研究结构的声辐射声场,利用有限元方法求解结构的表面速度分布,作为Helmholtz边界积分方程的边界条件,计算结构辐射的声场。边界积分方程中奇异积分的计算采用非等参单元变换,并采用CHIEF方法对Helmholtz方程的非唯一处理,并通过脉动球源与辐射立方体对仿真计算进行验证,结果表明,采用非等参单元与CHIEF方法计算的结果与理论的结果有良好的一致性。Finite element method（FEM） and boundary element method（BEM） were applied to study the structural acoustic radiation field.The surface velocity distribution of the structure was computed by FEM,which is used the boundary conditions of Helmholtz boundary integral equation to analyze the structural acoustic radiation.The non-isoparametric transformation was used to treat the singular integrals of boundary integral equations with,and the CHIEF non-unique processing method was used for Helmholtz equation.The spherical pulse of the by the cube of the radiation source and was verified by simulation results.Numerical results of the non-isoparametric CHIEF calculation method are in good agreement with the theoretical ones.

关 键 词：有限元 边界元 声辐射 

分 类 号：U661.4[交通运输工程—船舶及航道工程]