Constructing analysis-suitable parameterization of computational domain from CAD boundary by variational harmonic method

Constructing analysis-suitable parameterization of computational domain from CAD boundary by variational harmonic method
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通过变分调和法从 CAD 边界构建分析-合适的计算域参数化

DOI:
10.1016/j.jcp.2013.06.029
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发表时间:
2013-11
影响因子:
4.1
通讯作者:
Galligo, Andre
Galligo, Andre
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xu, Gang;Xu, Gang;Mourrain, Bernard;Mourrain, Bernard;Duvigneau, Regis;Duvigneau, Regis;Galligo, Andre;Galligo, Andre

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在等几何分析中,计算域的参数化对有限元网格划分有着重要的影响。本文基于计算域到参数域的调和映射概念,提出了一种变分调和方法,用于从CAD边界构造适合分析的计算域参数化,并应用于二维和三维等几何应用。与以往有限元分析中的椭圆网格生成方法不同,该方法侧重于等几何形式,将椭圆偏微分方程转化为非线性优化问题,在优化公式中引入正则项,在边界凸(凹)部附近实现更加均匀和正交的等参结构。通过几个例子说明了该方法在二维和三维等几何分析中的有效性。
In isogeometric analysis, parameterization of computational domain has great effects as mesh generation in finite element analysis. In this paper, based on the concept of harmonic mapping from the computational domain to parametric domain, a variational harmonic approach is proposed to construct analysis-suitable parameterization of computational domain from CAD boundary for 2D and 3D isogeometric applications. Different from the previous elliptic mesh generation method in finite element analysis, the proposed method focuses on isogeometric version, and converts the elliptic PDE into a nonlinear optimization problem, in which a regular term is integrated into the optimization formulation to achieve more uniform and orthogonal iso-parametric structure near convex (concave) parts of the boundary. Several examples are presented to show the efficiency of the proposed method in 2D and 3D isogeometric analysis.
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影响因子: --
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