arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.1774math.NAcs.NA
收藏

基于力的准连续近似中的线性平稳迭代方法

Linear Stationary Iterative Methods for the Force-based Quasicontinuum Approximation

University of Minnesota(明尼苏达大学)

Mitchell Luskin, Christoph Ortner

AI总结:

针对力基多物理耦合方法中线性化准连续近似非对称不定结构及稳定性挑战,系统分析多种线性平稳迭代法的稳定性与收敛率。

摘要:

基于力的多物理耦合方法因其提供简单高效的耦合机制而变得流行,避免了制定和实现一致耦合能量的困难。它们也是将通用原子模型耦合到有限元连续体模型的唯一已知点态一致方法。然而,由于线性化力基准连续近似的非对称和不定结构,以及其不寻常的稳定性特性,开发高效可靠的迭代求解方法面临挑战。本文通过严格的数值分析和计算实验,系统研究了多种线性平稳迭代方法的稳定性和收敛率。

英文摘要:

Force-based multiphysics coupling methods have become popular since they provide a simple and efficient coupling mechanism, avoiding the difficulties in formulating and implementing a consistent coupling energy. They are also the only known pointwise consistent methods for coupling a general atomistic model to a finite element continuum model. However, the development of efficient and reliable iterative solution methods for the force-based approximation presents a challenge due to the non-symmetric and indefinite structure of the linearized force-based quasicontinuum approximation, as well as to its unusual stability properties. In this paper, we present rigorous numerical analysis and computational experiments to systematically study the stability and convergence rate for a variety of linear stationary iterative methods.

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。

↑