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arXiv 1503.08462math.NAcs.NA
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不同情况下求解本征值问题的代数多重网格法

An Algebraic Multigrid Method for Eigenvalue Problems in Some Different Cases

Ning Zhang, Xiaole Han, Yunhui He, Hehu Xie, Chun'guang You

摘要:

将多层校正格式与求解线性方程的代数多重网格方法相结合,提出了求解本征值问题的代数多重网格方法。我们的方法使用代数多重网格方法的设置过程来构建层次和网格间的转移算子。在这种代数多重网格方法中,一个大规模的特征值问题是通过层次中的代数多重网格光滑步骤和非常小的维数的本征值问题来解决的。为了强调所提出的方法的效率和灵活性,在这里,我们考虑了一组测试本征值问题,离散非结构化网格,具有不同形状的域,奇异性,和不连续的参数。此外,得到了与期望特征值个数无关的整体收敛。

英文摘要:

The aim of this paper is to develop an algebraic multigrid method to solve eigenvalue problems based on the combination of the multilevel correction scheme and the algebraic multigrid method for linear equations. Our approach uses the algebraic multigrid method setup procedure to construct the hierarchy and the intergrid transfer operators. In this algebraic multigrid scheme, a large scale eigenvalue problem is solved by some algebraic multigrid smoothing steps in the hierarchy and very small-dimensional eigenvalue problems. To emphasize the efficiency and flexibility of the proposed method, here we consider a set of test eigenvalue problems, discretized on unstructured meshes, with different shape of domain, singularity, and discontinuous parameters. Moreover, global convergence independent of the number of desired eigenvalues is obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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