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首页> 外文期刊>Journal of Mechanical Science and Technology >A Petrov-Galerkin Natural Element Method Securing the Numerical Integration Accuracy
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A Petrov-Galerkin Natural Element Method Securing the Numerical Integration Accuracy

机译:确保数值积分精度的Petrov-Galerkin自然元方法

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摘要

An improved meshfree method called the Petrov-Galerkin natural element (PG-NE) method is introduced in order to secure the numerical integration accuracy. As in the Bubnov-Galerkin natural element (BG-NE) method, we use Laplace interpolation function for the trial basis function and Delaunay triangles to define a regular integration background mesh. But, unlike the BG-NE method, the test basis function is differently chosen, based on the Petrov-Galerkin concept, such that its support coincides exactly with a regular integration region in background mesh. Illustrative numerical experiments verify that the present method successfully prevents the numerical accuracy deterioration stemming from the numerical integration error.
机译:为了确保数值积分精度,引入了一种改进的无网格方法,称为Petrov-Galerkin自然元法(PG-NE)。与Bubnov-Galerkin自然元素(BG-NE)方法一样,我们使用拉普拉斯插值函数作为试验基础函数,并使用Delaunay三角形定义规则的积分背景网格。但是,与BG-NE方法不同,基于Petrov-Galerkin概念选择了测试基础函数,以使其支持与背景网格中的规则积分区域完全重合。说明性的数值实验证实了本方法成功地防止了由于数值积分误差引起的数值精度的降低。

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