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Numerical study of the shape parameter dependence of the local radial point interpolation method in linear elasticity

机译:线弹性中局部径向点插值法形状参数依赖性的数值研究

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摘要

The method LRPIM is a Meshless method with properties of simple implementation of the essential boundary conditions and less costly than the moving least squares (MLS) methods. This method is proposed to overcome the singularity associated to polynomial basis by using radial basis functions. In this paper, we will present a study of a 2D problem of an elastic homogenous rectangular plate by using the method LRPIM. Our numerical investigations will concern the influence of different shape parameters on the domain of convergence,accuracy and using the radial basis function of the thin plate spline. It also will presents a comparison between numerical results for different materials and the convergence domain by precising maximum and minimum values as a function of distribution nodes number. The analytical solution of the deflection confirms the numerical results. The essential points in the method are: class="first-line-outdent">
  • • The LRPIM is derived from the local weak form of the equilibrium equations for solving a thin elastic plate.
  • • The convergence of the LRPIM method depends on number of parameters derived from local weak form and sub-domains.
  • • The effect of distributions nodes number by varying nature of material and the radial basis function (TPS).
  • 机译:LRPIM方法是一种无网格方法,具有基本边界条件的简单实现且比移动最小二乘法(MLS)便宜的特性。为了克服与多项式基相关的奇异性,提出了使用径向基函数的方法。在本文中,我们将使用LRPIM方法对弹性均质矩形板的二维问题进行研究。我们的数值研究将关注不同形状参数对薄板样条的收敛性,准确性和使用径向基函数的影响。通过规定最大值和最小值作为分布节点数的函数,还将比较不同材料的数值结果和收敛域。挠度的解析解证实了数值结果。该方法的要点是: class =“ first-line-outdent”> <!-list-behavior =简单的前缀-word = mark-type = none max-label-size = 9->
  • •LRPIM是从求解薄弹性板的平衡方程的局部弱形式中得出的。
  • •LRPIM方法的收敛性取决于模型的数量。参数来自局部弱形式和子域。
  • •通过改变材料的性质和径向基函数(TPS)对分布节点数的影响。 ul>
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