Depending on the three-order spline interpolation function, the computer resource problem resulted from the denseness of coefficient matrix is disposed.

• 以带电屏蔽的变压器的漏磁场及涡流场计算为背景，提出了一种三维有限元 一积分方程相互迭代的算法，该法只需要刮分铁磁物质和导体区，大大缩小了求 解区域。