The use of the preconditioned complex bi-conjugate gradient method will lead to a poor convergence when the coefficient matrix of the finite element equations is ill-conditioned. The factors influencing on the convergence are analyzed. Some sueful strategies to improve the convergence are proposed in this paper based on the experience of the 3D eddy current field computation. The strategies are suitategies are suitable to the ICCG method too.
展开▼
