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Quadratically consistent integration schemes for the element-free Galerkin method

机译:自由元素Galerkin方法的二次一致的集成方案

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This paper presents two efficient integration schemes for the element-free Galerkin (EFG) method. They are able to let EFG with quadratic basis pass the quadratic patch test exactly in a numerical sense. The proposed two schemes, respectively, use three and one quadrature points in each background triangle cell and the derivatives of the nodal shape functions at these quadrature points are corrected by the introduced discrete divergence consistency (DDC) condition. Numerical results of benchmark examples demonstrate the improved accuracy, convergence, efficiency and stability by the proposed schemes.
机译:本文为无元素Galerkin(EFG)方法提供了两种有效的集成方案。它们能够让EFG具有二次基础,并在数值意义上完全达到二次补丁测试。所提出的两个方案分别在每个背景三角形单元中使用三个和一个正交点,并且通过引入的离散发散一致性(DDC)条件来校正这些正交点处的节点形状函数的衍生物。基准示例的数值结果证明了所提出的方案的提高精度,收敛,效率和稳定性。

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