基于有限元法的水下绝缘体小目标电磁场探测方法仿真研究

开展具有自主知识产权的水下绝缘体小目标探测方法研究，可为我国海域勘探开发提供技术支撑。文章将基于有限元的电磁场探测方法应用到水下绝缘体小目标的检测:首先利用ANSYS Maxwell软件进行建模仿真；然后对不同电流及不同水面高度/水下深度有无绝缘体小目标的磁感应强度进行模拟并计算其差值。结果表明，当水下导线直流电流为200 A时，磁感应强度模拟差值大于0.3 nT，可在350 m×350 m×35 m的海域内有效探测有无绝缘体小目标通过。

Simulation of detecting small underwater insulative target through electromagnetic field based on finite element method

It is desirable to develop an effective method for detecting the small insulative underwater target for the marine exploration and development. In this paper, an electromagnetic field detection method based on the finite elements is proposed for the detection of small underwater insulative targets. The simulation is carried out by using the ANSYS Maxwell software. According to the calculated difference of the magnetic induction intensity with or without the target for different current values in the underwater wire and different water heights and depths of the object, it is shown that for the current as high as 200 A passing through the underwater wire, the simulated difference of the magnetic induction intensity is greater than 0.3 nT, adequate to determine whether there is a small insulative target in the sea area of 350 m×350 m×35 m.