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arXiv 2407.02433math.NAcs.NA
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基于弹性的变形技术及其在降阶建模中的应用

Elasticity-based morphing technique and application to reduced-order modeling

Abbas Kabalan, Fabien Casenave, Felipe Bordeu, Virginie Ehrlacher, Alexandre Ern

AI总结:

本文提出一种基于线性弹性方程的形状变形新方法,通过求解一系列弹性方程实现相同拓扑形状间的变形,无需边界参数化且可施加约束对齐,并成功应用于降阶建模中的离线与在线范式。

摘要:

本文旨在介绍一种构建具有相同拓扑的形状之间变形的新方法。该方法通过求解一系列线性弹性方程,将参考形状变形到每个目标形状上,从而获得变形。特别地,该方法无需任何边界参数化知识,也不必预先计算边界变形。此外,可在参考域中的特定点、线和面上施加约束,以确保变形后与目标域中的对应部分对齐。同时,我们展示了该方法如何整合到离线与在线范式中,这对于涉及可变形状的降阶建模非常有用。该框架有助于在各种几何配置下高效计算变形,从而提升了方法的通用性与适用性。通过二维测试用例,包括对非参数化变形状翼型的阻力和升力系数进行回归问题求解,验证了该方法的鲁棒性与计算效率。

英文摘要:

The aim of this article is to introduce a new methodology for constructing morphings between shapes that have identical topology. The morphings are obtained by deforming a reference shape, through the resolution of a sequence of linear elasticity equations, onto every target shape. In particular, our approach does not assume any knowledge of a boundary parametrization, and the computation of the boundary deformation is not required beforehand. Furthermore, constraints can be imposed on specific points, lines and surfaces in the reference domain to ensure alignment with their counterparts in the target domain after morphing. Additionally, we show how the proposed methodology can be integrated in an offline and online paradigm, which is useful in reduced-order modeling involving variable shapes. This framework facilitates the efficient computation of the morphings in various geometric configurations, thus improving the versatility and applicability of the approach. The robustness and computational efficiency of the methodology is illustrated on two-dimensional test cases, including the regression problem of the drag and lift coefficients of airfoils of non-parameterized variable shapes.

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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