The vector plot of 3D magnetic flux and the surface plot for the radial component of magnetic flux density were obtained,which could show the feature of the MLF near defect expressly.

• 利用数学模型对漏磁信号进行了仿真分析,得到了三维磁通密度矢量图和它的径向分量曲面图,直观地显示了缺陷附近漏磁场的特点。