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arXiv 1807.03563math.NAcs.NA
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一种基于准插值求积方案的自适应IGA-BEM

An adaptive IGA-BEM with hierarchical B-splines based on quasi-interpolation quadrature schemes

University of Firenze(佛罗伦萨大学);University of Siena(锡耶纳大学)

Antonella Falini, Carlotta Giannelli, Tadej Kanduc, Maria Lucia Sampoli, Alessandra Sestini

AI总结:

本文提出了一种基于准插值求积方案的自适应IGA-BEM方法,通过引入适合的加权求积规则来评估伽辽金BEM公式中出现的积分,利用分层设置框架实现高效准确的数值方案,并通过残差驱动的自适应细化策略实现最优收敛率。

摘要:

在自适应框架内研究了边界元方法(BEM)的等几何公式。引入了适合评估伽辽金BEM公式中出现的积分的加权求积规则。新的求积方案基于样条准插值(QI)算子,并在分层设置中得到适当框架。QI的局部性质与分层样条构造完美契合,导致高效的数值方案。通过残差驱动的自适应细化策略,数值例子显示所提出的自适应方法能够恢复BEM解的最优收敛率。

英文摘要:

The isogeometric formulation of Boundary Element Method (BEM) is investigated within the adaptivity framework. Suitable weighted quadrature rules to evaluate integrals appearing in the Galerkin BEM formulation of 2D Laplace model problems are introduced. The new quadrature schemes are based on a spline quasi-interpolant (QI) operator and properly framed in the hierarchical setting. The local nature of the QI perfectly fits with hierarchical spline constructions and leads to an efficient and accurate numerical scheme. An automatic adaptive refinement strategy is driven by a residual based error estimator. Numerical examples show that the optimal convergence rate of the BEM solution is recovered by the proposed adaptive method.

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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