BAN Yong-ling, NIE Zai-ping, YU Zhe-feng. An Efficient Preconditioner Based on Higher Order Hierarchical Basis Functions[J]. Acta Electronica Sinica, 2007, 35(9): 1739-1744.
BAN Yong-ling, NIE Zai-ping, YU Zhe-feng. An Efficient Preconditioner Based on Higher Order Hierarchical Basis Functions[J]. Acta Electronica Sinica, 2007, 35(9): 1739-1744.DOI:
A preconditioner is proposed for accelerating solutions of finite element matrix equations.The preconditioner is constructed from a sequence of hierarchical vector spaces spanned by higher order hexahedral basis functions.The preconditioned GMRES algorithm with the precondtioner presented is developed and applied to solve the vector finite element-boundary integral (FE-BI) matrix equations for simulation of scattering from three-dimensional cavities.Numerical results show that the preconditioner for solving the FE-BI systems exhibits superior efficiency and reduced the CPU time significantly.