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arXiv 2205.04752math.NAcs.NA
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自适应$\mathcal{H}$ -线性弹性力学的矩阵计算

Adaptive $\mathcal{H}$-Matrix Computations in Linear Elasticity

Maximilian Bauer, Mario Bebendorf

摘要:

本文讨论了Lamé方程的自适应近似计算。将线弹性力学方程视为边界积分方程,在边界元法(BEM)中求解。使用边界元法,人们面临着具有完全填充的系统矩阵的方程组的解,这通常是非常昂贵的。提出了基于分层矩阵和自适应交叉逼近的自适应算法。首先,一个自适应矩阵向量乘法计划的有效处理乘以离散与给定的数据。的战略,达到这一目标,是使用误差估计和技术已知的自适应性。文中还讨论了用这种新的自适应逼近线性方程组中的系统矩阵的情况。

英文摘要:

This article deals with the adaptive and approximative computation of the Lamé equations. The equations of linear elasticity are considered as boundary integral equations and solved in the setting of the boundary element method (BEM). Using BEM, one is faced with the solution of a system of equations with a fully populated system matrix, which is in general very costly. Some adaptive algorithms based on hierarchical matrices and the adaptive cross approximation are proposed. At first, an adaptive matrix-vector multiplication scheme is introduced for the efficient treatment of multiplying discretizations with given data. The strategy, to reach this aim, is to use error estimators and techniques known from adaptivity. The case of approximating the system matrix appearing in the linear system of equations with this new type of adaptivity is also discussed.

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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