浅海中电导率对同一水平面轴频电场的影响

摘要

In order to research the seawater conductivity′s effect on the shaft-rate electric field,the expression of electric field in the three layers based on horizontal harmonic current is derived at first, and then through researching amplitude variation of shaft-rate electric filed with different seawater conductivity in certain depth of shallow sea,the variation curve diagram with the seawater conductivi-ty in the depth is obtained.Research conclusions show that with the increase of seawater conductivity, the amplitude of electric filed decreases,and when the value of seawater conductivity is small,the change tendency of electric filed value is bigger.Finally,the correctness of simulation conclusion is verified by measuring the shaft-rate electric filed in different seawater conductivity.%为了研究电导率对浅海中轴频电场的影响,首先在基于水平时谐电流元的基础上推导出三层介质中电场表达式;然后,通过研究在某一海水深度不同海水电导率下的轴频电场幅值变化,得出了轴频电场随电导率变化而产生的变化曲线图趋势,即海水电导率的增加会使电场幅值减小,且当电导率较小时,电场值变化趋势较大;最后,通过实验测量不同电导率下的轴频电场,验证了结论的正确性.