有限元法在水平电偶极子电场仿真计算中的应用

Application of Finite Element Method in the Electric Field Simulation Calculation of Horizontal Electric Dipole

根据电导率的不同可以将海洋环境进行分层,浅海环境模型可等效为空气-海水-海床三层模型。基于有限元法有限元仿真软件建立水平电偶极子电场计算模型,通过改变测线的位置(即Y坐标的值),对水平电偶极子在分层模型海水中同一平面上不同水平位置处的电场特性进行仿真计算研究,并与相应的数学模型进行对比分析。从结果可知,不同情况下两种模型计算所得电场特性曲线的形态一致,其中在测线1处(即Y=0),两者X、Z分量幅值最大值误差分别为2.8%和0.1%;测线2处(即Y=10),两者X、Z分量幅值最大值误差分别为3.2%和0.1%。

The seawater is layered according to the different conductivities.The shallow sea model is equivalent to air-seawa⁃ter-seabed three layers model.The electric field calculation model of HED is built on the basis of the FEM simulation software.The locations of the measuring lines that the Y-coordinates are changed.And the electric field of HED from the different locations on the same plane is simulated.And the results are contrasted with the ones of mathematic model.As the results show,the patterns of elec⁃tric field characteristic curves are both concordant.When on the location of measuring line1(Y=0),the errors of X-component and Z-component maximum amplitudes of electric field are respectively 2.8%and 0.1%.When on the location of measuring line2(Y=10),the errors of X-component and Z-component maximum amplitudes of electric field are respectively 3.2%and 0.1%.