An improved interpolating element-free Galerkin method with a nonsingular weight function for two-dimensional potential problems

作者：Wang Ju-Feng; Sun Feng-Xin; Cheng Yu-Min^*

来源：Chinese Physics B, 2012, 21(9): 090204.

DOI：10.1088/1674-1056/21/9/090204

• meshless method
• improved interpolating moving least-square method
• improved interpolating element-free Galerkin method
• potential problem

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 delta 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.

• 出版日期2012-9
• 单位上海大学; 浙江大学宁波理工学院; 浙江大学; 宁波工程学院