A new complex variable element-free Galerkin method for two-dimensional potential problems

A new complex variable element-free Galerkin method for two-dimensional potential problems
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解决二维势问题的一种新的复变无元伽辽金方法

DOI:
10.1088/1674-1056/21/9/090203
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发表时间:
2012-09
期刊:
影响因子:
1.7
通讯作者:
Bai Funong
Bai Funong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cheng Yumin;Wang Jianfei;Bai Funong

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本文在无单元伽辽金(EFG)方法和改进的复变量移动最小二乘(ICVMLS)近似的基础上,提出了一种新的无网格方法,即针对二维潜在问题的改进的复变量无单元伽辽金(ICVEFG)方法。该方法采用控制方程的积分弱形式,并使用拉格朗日乘子来应用必要的边界条件。然后得到二维潜在问题的ICVEFG方法的相应公式。与Cheng提出的复变量移动最小二乘(CVMLS)近似相比,ICVMLS近似中的泛函具有明确的物理意义。此外,ICVEFG方法具有更高的计算精度和效率。给出了三个数值例子来证明该方法的有效性。
In this paper, based on the element-free Galerkin (EFG) method and the improved complex variable moving least-square (ICVMLS) approximation, a new meshless method, which is the improved complex variable element-free Galerkin (ICVEFG) method for two-dimensional potential problems, is presented. In the method, the integral weak form of control equations is employed, and the Lagrange multiplier is used to apply the essential boundary conditions. Then the corresponding formulas of the ICVEFG method for two-dimensional potential problems are obtained. Compared with the complex variable moving least-square (CVMLS) approximation proposed by Cheng, the functional in the ICVMLS approximation has an explicit physical meaning. Furthermore, the ICVEFG method has greater computational precision and efficiency. Three numerical examples are given to show the validity of the proposed method.
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发表时间: 2006-02
期刊: Science in China Series G-Physics Mechanics & Astronomy
影响因子: --
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