An Improvement of Convergence in Finite Element Analysis With Infinite Element Using Deflation

被引:4
作者
Ito, Hiroki [1 ]
Watanabe, Kota [1 ]
Igarashi, Hajime [1 ]
机构
[1] Hokkaido Univ, Grad Sch Informat Sci & Technol, Sapporo, Hokkaido 0600814, Japan
关键词
Deflation; electromagnetic field analysis; finite element method; infinite element;
D O I
10.1109/TMAG.2011.2173468
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents a deflation technique to improve the convergence of finite element (FE) analyses with infinite elements. In FE analyses of electromagnetic fields, large air regions must be discretized into FE meshes. This leads to increases in computational time. The infinite element in which electromagnetic fields in air region are accurately expressed has been introduced in order to solve this problem. However, when using the infinite element, convergence of iterative liner solvers deteriorates because the condition number of FE matrices becomes large. In this paper, a deflation technique to improve convergence of iterative solvers is introduced. Numerical examples show that the proposed technique can improve convergence characteristics in a magnetostatic analysis with finite and infinite elements.
引用
收藏
页码:667 / 670
页数:4
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