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A Pseudospectral Approach for Kirchhoff Plate Bending Problems with Uncertainties

机译:具有不确定性的Kirchhoff板弯曲问题的伪谱方法

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摘要

This paper proposes a pseudospectral approach for the Kirchhoff plate bending problem with uncertainties. The Karhunen-Loeve expansion is used to transform the original problem to a stochastic fourth-order PDE depending only on a finite number of random variables. For the latter problem, its exact solution is approximated by a gPC expansion, with the coefficients obtained by the sparse grid method. The main novelty of the method is that it can be carried out in parallel directly while keeping the high accuracy and fast convergence of the gPC expansion. Several numerical results are performed to show the accuracy and performance of the method.
机译:本文针对具有不确定性的Kirchhoff板弯曲问题提出了伪谱方法。 Karhunen-Loeve展开用于仅根据有限数量的随机变量将原始问题转换为随机的四阶PDE。对于后一个问题,其精确解可以通过gPC展开来近似,其系数是通过稀疏网格方法获得的。该方法的主要新颖之处在于,可以在保持gPC扩展的高精度和快速收敛性的同时,直接并行执行。进行了几个数值结果,显示了该方法的准确性和性能。

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  • 来源
    《Mathematical Problems in Engineering》 |2012年第5期|p.58.1-58.14|共14页
  • 作者

    Ling Guo; Jianguo Huang;

  • 作者单位

    Department of Mathematics, Shanghai Normal University, Shanghai 200234, Chirm,Department of Mathematics, Shanghai ]iao Tong University, Shanghai 200240, China;

    Department of Mathematics, Shanghai ]iao Tong University, Shanghai 200240, China,Division of Computational Science, E-Institute of Shanghai Universities and Scientific Computing, Key Laboratory of Shanghai Universities, Shanghai Normal University, China;

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