潜艇磁化场的有限元方法研究

准确获取地磁场数据是水下地磁导航研究的难点之一。只有掌握了潜艇磁化磁场特性,才能提供正确和可行的消除磁场干扰的方法,并最终获得真实的磁场数据。文章以潜艇坐标系为参考系,建立潜艇磁场方程和边界条件,并采用有限元方法进行了分析和计算。首先研究了只有X方向磁场作用时,潜艇某截面的磁场分布,绘出某直线上磁场各分量的曲线,得到了外界磁场与潜艇磁场之间的线性关系。接着,分别研究了只有Y,Z方向磁场作用的情形,得到类似结论。

Study on magnetization of submarine based on finite-element method

It is one of the most difficult issues in automatic navigation for underwater vehicle to accurately measure geomagnetic field. If magnetization of submarine is mastered,the methods of abstracting accurate geomagnetic field will be found. In paper,submarine-coordinate system is the reference frame and magnetic equation and boundary condition are founded. In paper,finite-element method is used to get the results. Firstly,under the promptings of outside magnetic field in X direction,magnetic field of submarine of some section and curve is painted. Based on these,the linear conversion relationship between magnetic field of submarine and environmental magnetic field is founded. Then,under the promptings of outside magnetic field in Y and Z direction separately,similar conclusions are obtained.