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Crosspoint modification for multi-patch isogeometric analysis

机译:用于多面体等几何分析的交叉点修改

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摘要

A crosspoint modification for general C-n continuous mortar coupling conditions is presented. In particular, we modify the extended mortar method as introduced in Schu beta et al. (2019) and Dittmann et al. (2019) to deal with crosspoints as they arise in multi-patch geometries. This modification is constructed in such a way, that we decouple the Lagrange multipliers at the crosspoint to avoid a global coupling condition across all interfaces. Moreover, we recast the underlying B-Splines such that they preserve the higher order best approximation property across the interface and the crosspoint. A detailed investigation is presented in the context of second order thermal problems, fourth order Cahn-Hilliard and sixth order Swift-Hohenberg formulations. (C) 2019 Elsevier B.V. All rights reserved.
机译:提出了针对一般C-n连续灰浆耦合条件的交叉点修改。特别是,我们修改了Schu beta等人中介绍的扩展砂浆方法。 (2019)和Dittmann等人。 (2019)处理交叉点出现在多面体几何中。此修改的构造方式是,我们在交叉点解耦拉格朗日乘数,以避免所有接口的全局耦合条件。此外,我们重铸了基础的B样条曲线,以便它们在界面和交叉点上保留更高阶的最佳近似特性。在二阶热问题,四阶Cahn-Hilliard和六阶Swift-Hohenberg公式的背景下,进行了详细的研究。 (C)2019 Elsevier B.V.保留所有权利。

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