有限水深海浪背景下船舶尾流感应电磁场数值模拟

Numerical Simulation of Electromagnetic Fields Induced by Ship Wakes in Ocean Waves of Finite Depth Water

本文建立有限水深海浪-尾流电磁场地电模型,根据麦克斯韦方程组及速度场表达式,考虑了分界面处电场连续性以及海底介质的影响,推导出新的有限水深三层介质中海浪及船舶开尔文尾流感应电磁场表达式。采用多频率线性叠加方法,模拟三维海浪感应电磁场;利用电磁场水平分量在分界面处连续条件得到船舶尾流感应电磁场计算式。通过仿真计算,分析了有限水深海浪感应电磁场、尾流感应电磁场以及海浪背景下尾流感应磁场响应特征。

In this paper,the expressions of EM fields induced by both the ocean waves and the ship wakes in the finite depth water are derived from Maxwell equations and velocity fields with the use of the continuity of electric field at the interfaces.We simulate EM fields induced by ocean waves and ship wakes.Wave induced EM fields are simulated by the using multi-frequency linear superposition.Based on the continuity of the horizontal components of the induced EM fields at the interface,ship wakes induced EM fields are obtained.We calculated EM fields induced by the ocean waves and the ship wakes and investigate the influence of by seawater motion on magnetic fields of ship wakes.