倾斜海床对水平电偶极子水下电场分布的影响

Influence of Inclined Seabed on Underwater Electric Field Distribution of Horizontal Electric Dipole

为研究复杂海洋环境中电场的分布,论文根据媒介电导率的不同将海洋环境分为空气-海水-倾斜海床三层模型,利用有限元仿真软件计算得出倾斜海床环境中电偶极子水下电场分布特性,并对比不同海床倾斜角度、不同海水电导率、不同海床电导率下电场分布特性。研究表明:随着海床倾角的逐渐增大,水下场源电场总电位、Ex、Ez特性曲线形态基本不变,但幅值随角度的增大有所偏移;当海床倾角一定时,水下场源电场总电位、Ex、Ez特性曲线形态基本不变,幅值随海水电导率的增大而减小。当海床倾角一定时,水下场源电场总电位、Ex、Ez特性曲线形态基本不变,对于Ez而言,海床电导率几乎无影响;对于总电位和Ex而言,当海床电导率为1S/m时电场特性曲线幅值减小。

To study the electric field distribution in the complex ocean environment,the marine environment can be divided into air-sea-inclined seabed three-layer model according to the medium electrical conductivity.In this paper the finite element sim⁃ulation software is used to calculate underwater electric field distribution characteristic of electric dipole in the inclined seabed envi⁃ronment,and the influence of different seabed slope angle,seawater conductivity,seabed conductivity on underwater electric field distribution characteristics is compared.The results show that the shape of the characteristic curves of the total electric potential,Ex and Ez of the underwater field source are basically unchanged with the gradual increase of the dip angle of the seabed,but the ampli⁃tudes are shifted with the increase of the angle.When the dip angle of the seabed is constant,the shape of the characteristic curves of the total electric potential,Ex and Ez of the field source are basically unchanged,and the amplitude decreases with the increase of the seawater conductivity.When the dip angle of seabed is constant,the total electric potential of field source and the characteris⁃tic curve of Ex and Ez are basically unchanged.For Ez,the conductivity of seabed has almost no influence.For total potential and Ex,the amplitude of the electric field characteristic curve decreases when the seabed conductivity is 1S/m.