摘要
用经典的选代法求解一组高阶线性稀疏方程时,常出现收敛速度慢.甚至振荡、不收敛的情况.在引入ICCG算法后,求解二维电磁场问题及三维电场问题时,得到了较好的效果。但计算三维磁场问题时,出现了振荡不收敛的现象。为此,对ICCG算法进行了改进,并对实例进行了计算。
For a large sparse sets of simultaneous equations,the classical iterative methodsl are usuallyyield bery poor convergence of the solution.The incomplde Cholesky conjugate gradientalgorithm has good conveigence rates at the computation of 2D elodroeqnetic problems,and 3D eledlic problems. But when it is ed to solve 3D magnetic problems some troublesale appeared. The improved ICCG algorithm is presented in this paper.
关键词
矩阵
ICCG算法
收敛
磁场计算
a large sparse sets
ICCG algorithm
convergenee
electromagnetic computation