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arXiv 2007.14343math.NAcs.NA
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多块等几何Kirchhoff板$C^1$耦合问题的投影超罚方法

A projected super-penalty method for the $C^1$-coupling of multi-patch isogeometric Kirchhoff plates

Luca Coradello, Gabriele Loli, Annalisa Buffa

摘要:

这项工作的重点是开发一个超级惩罚策略的基础上的$L^2$ -投影适当的耦合项,以实现$C^1$ -连续性之间的非协调多补丁等几何基尔霍夫板。特别是,罚参数的选择是由潜在的扰动鞍点问题,从拉格朗日乘子被消除,并执行,以保证该方法的最佳精度。此外,通过构造,该方法在非常粗的网格上也不会受到锁定的影响。我们证明了所提出的耦合算法基尔霍夫板的适用性,通过研究几个基准的例子离散的非协调网格。在所有情况下,我们恢复B样条实现的最佳收敛速度,在那里我们实现了相当大的增益,每自由度的准确度相比,其他选择的罚参数。

英文摘要:

This work focuses on the development of a super-penalty strategy based on the $L^2$-projection of suitable coupling terms to achieve $C^1$-continuity between non-conforming multi-patch isogeometric Kirchhoff plates. In particular, the choice of penalty parameters is driven by the underlying perturbed saddle point problem from which the Lagrange multipliers are eliminated and is performed to guarantee the optimal accuracy of the method. Moreover, by construction, the method does not suffer from locking also on very coarse meshes. We demonstrate the applicability of the proposed coupling algorithm to Kirchhoff plates by studying several benchmark examples discretized by non-conforming meshes. In all cases, we recover the optimal rates of convergence achievable by B-splines where we achieve a substantial gain in accuracy per degree-of-freedom compared to other choices of the penalty parameters.

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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