An improved interpolating element-free Galerkin method with a nonsingular weight function for two-dimensional potential problems |
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| Authors: | Wang Ju-Feng Sun Feng-Xin and Cheng Yu-Min |
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| Affiliation: | [1]Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China [2]Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China [3]Faculty of Science, Ningbo University of Technology, Ningbo 315016, China |
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| Abstract: | In this paper, an improved interpolating moving least-square (IIMLS) method is presented. The shape function of the IIMLS method satisfies the property of the Kronecker δ function. The weight function used in the IIMLS method is nonsingular. Then the IIMLS method can overcome the difficulties caused by the singularity of the weight function in the IMLS method. The number of unknown coefficients in the trial function of the IIMLS method is less than that of the moving least-square (MLS) approximation. Then by combining the IIMLS method with the Galerkin weak form of the potential problem, the improved interpolating element-free Galerkin (IIEFG) method for two-dimensional potential problems is presented. Compared with the conventional element-free Galerkin (EFG) method, the IIEFG method can directly use the essential boundary conditions. Then the IIEFG method has higher accuracy. For demonstration, three numerical examples are solved using the IIEFG method. |
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| Keywords: | meshless method improved interpolating moving least-square method improved inter-polating element-free Galerkin method potential problem |
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