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arXiv 1402.2171math.NAcs.NA
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一种新的低成本无网格方法用于弹性问题的二维和三维问题

A new low-cost meshfree method for two and three dimensional problems in elasticity

University of Isfahan(伊斯法罕大学)

Davoud Mirzaei

AI总结:

本文提出了一种改进的直接无网格局部 Petrov-Galerkin 方法,用于弹性静力学问题,通过提高计算效率,简化了局部弱形式的积分过程,展示了其在二维和三维弹性问题中的有效性。

摘要:

在本文中,我们继续发展用于弹性静力学问题的直接无网格局部 Petrov-Galerkin(DMLPG)方法。该方法基于广义移动最小二乘近似。与原始 MLPG 相比,新的方法在计算效率方面具有显著优势。尽管使用了 Petrov-Galerkin 策略来构建原始局部弱形式,但忽略了试空间的作用,并直接对局部弱形式和边界条件进行近似以构建最终的刚度矩阵。在该修改中,数值积分是在多项式上进行,而不是复杂的 MLS 形状函数。在本文中,DMLPG 被应用于弹性问题的二维和三维问题。一些新方法的变种被开发并报告了其效率。最后,我们将得出结论,DMLPG 可以在许多情况下替代原始 MLPG。

英文摘要:

In this paper, we continue the development of the Direct Meshless Local Petrov-Galerkin (DMLPG) method for elasto-static problems. This method is based on the generalized moving least squares approximation. The computational efficiency is the most significant advantage of the new method in comparison with the original MLPG. Although, the "Petrov-Galerkin" strategy is used to build the primary local weak forms, the role of trial space is ignored and direct approximations for local weak forms and boundary conditions are performed to construct the final stiffness matrix. In this modification the numerical integrations are performed over polynomials instead of complicated MLS shape functions. In this paper, DMLPG is applied for two and three dimensional problems in elasticity. Some variations of the new method are developed and their efficiencies are reported. Finally, we will conclude that DMLPG can replace the original MLPG in many situations.

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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