Deflation, Projector Preconditioning, and Balancing in Iterative Substructuring Methods: Connections and New Results
Deflation, Projector Preconditioning, and Balancing in Iterative Substructuring Methods: Connections and New Results
复制标题
迭代子结构方法中的紧缩、投影仪预处理和平衡:联系和新结果
DOI:
10.1137/100811118
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Rheinbach
中科院分区:
文献类型:
--
作者:
Klawonn;Rheinbach
In this paper, projector preconditioning, also known as the deflation method, as well as the balancing preconditioner are applied to the dual-primal finite element tearing and interconnecting (FETI-DP) and balancing domain decomposition by constraints (BDDC) methods in order to create a second, independent coarse problem. This may help to extend the parallel scalability of classical FETI-DP and BDDC methods without the use of inexact solvers and may also be used to improve the robustness, e.g., for almost incompressible elasticity problems. Connections of FETI-DP methods applying a transformation of basis using a larger coarse space with a corresponding FETI-DP method using projector preconditioning or balancing are pointed out. It is then shown that the methods have essentially the same spectrum. Numerical results for compressible and almost incompressible linear elasticity are provided. The sensitivity of the projection methods to an inexact computation of the projections is numerically investigated and a different behavior for projector preconditioning and the balancing preconditioner is found.
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影响因子:
2.9
作者:
A. Klawonn;O. Rheinbach
通讯作者:
O. Rheinbach
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Jungho Lee
通讯作者:
Jungho Lee
影响因子:
4.3
作者:
C. Dohrmann
通讯作者:
C. Dohrmann
DOI:
10.1137/s0036142903430451
发表时间:
2004
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
R. Nabben;C. Vuik
通讯作者:
C. Vuik
影响因子:
1.8
作者:
Z. Dostál
通讯作者:
Z. Dostál