The complex variable reproducing kernel particle method for two-dimensional elastodynamics

The complex variable reproducing kernel particle method for two-dimensional elastodynamics
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二维弹性动力学复变量再现核粒子法

DOI:
10.1088/1674-1056/19/9/090204
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发表时间:
2010-09
期刊:
影响因子:
1.7
通讯作者:
--
中科院分区:
物理与天体物理3区
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--
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在再生核质点法(RKPM)的基础上,提出了一种求解二维弹性动力学问题的新的无网格方法--复变量再生核质点法(CVRKPM)。CVRKPM的优点是在得到形函数的同时,用一维基函数形成二维问题的修正函数。采用Galerkin弱形式离散系统方程,采用Newmark隐式时程积分法进行时程分析。采用罚函数法施加本质边界条件。在此基础上,得到了二维弹性动力学CVRKPM的相应公式。给出了三个二维弹性动力学的数值算例,并将CVRKPM的结果与RKPM和解析解的结果进行了比较。结果表明,CVRKPM的数值结果与解析解吻合良好,且CVRKPM比RKPM具有更高的精度。
On the basis of the reproducing kernel particle method (RKPM), a new meshless method, which is called the complex variable reproducing kernel particle method (CVRKPM), for two-dimensional elastodynamics is presented in this paper. The advantages of the CVRKPM are that the correction function of a two-dimensional problem is formed with one-dimensional basis function when the shape function is obtained. The Galerkin weak form is employed to obtain the discretised system equations, and implicit time integration method, which is the Newmark method, is used for time history analysis. And the penalty method is employed to apply the essential boundary conditions. Then the corresponding formulae of the CVRKPM for two-dimensional elastodynamics are obtained. Three numerical examples of two-dimensional elastodynamics are presented, and the CVRKPM results are compared with the ones of the RKPM and analytical solutions. It is evident that the numerical results of the CVRKPM are in excellent agreement with the analytical solution, and that the CVRKPM has greater precision than the RKPM.
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