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arXiv 2204.09448math.NAcs.NA
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完全匹配层(IGAPML)声散射的等几何分析

Isogeometric Analysis of Acoustic Scattering with Perfectly Matched Layers (IGAPML)

Jon Vegard Venås, Trond Kvamsdal

摘要:

完全匹配层(PML)格式是处理无界域辐射问题的一种重要方法,由于其在有限元程序中的简单实现而引起人们的兴趣。然而,它的简单性可以使用等几何框架进一步推进。本文提出了一种基于样条的PML公式,它避免了额外的坐标变换,因为该公式是基于相同的空间,其中的数值解寻求。该过程可以自动化的任何凸人工边界。这消除了对使用PML的域构造的限制,因此可以降低计算成本并提高网格质量。样条基函数的连续性也提高了数值解的精度。

英文摘要:

The perfectly matched layer (PML) formulation is a prominent way of handling radiation problems in unbounded domain and has gained interest due to its simple implementation in finite element codes. However, its simplicity can be advanced further using the isogeometric framework. This work presents a spline based PML formulation which avoids additional coordinate transformation as the formulation is based on the same space in which the numerical solution is sought. The procedure can be automated for any convex artificial boundary. This removes restrictions on the domain construction using PML and can therefore reduce computational cost and improve mesh quality. The usage of spline basis functions with higher continuity also improves the accuracy of the numerical solution.

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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