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arXiv 1502.06065math.NAcs.NA
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混合应力四边形有限元近似用于随机平面弹性方程

Hybrid stress quadrilateral finite element approximation for stochastic plane elasticity equations

School of Mathematics, Sichuan University(四川大学数学学院)

Xiaojing Xu, Wenwen Fan, Xiaoping Xie

AI总结:

本文研究随机平面弹性方程的混合应力四边形有限元分析,采用Karhunen-Loève展开将随机Young模量和载荷转化为确定性参数系统,结合k-版本/p-版本有限元法和混合应力四边形有限元法,推导出与Lamé常数λ无关的先验误差估计,并提供数值结果。

摘要:

本文考虑具有随机Young模量和随机载荷的平面弹性方程的随机混合应力四边形有限元分析。首先,我们应用Karhunen-Loève展开将随机Young模量和载荷转化为包含有限确定性参数的系统。然后,我们分别用k-版本/p-版本有限元法处理随机场和空间场,并采用混合应力四边形有限元法。我们证明推导出的先验误差估计与Lamé常数λ∈(0,+∞)无关。最后,我们提供了一些数值结果。

英文摘要:

This paper considers stochastic hybrid stress quadrilateral finite element analysis of plane elasticity equations with stochastic Young's modulus and stochastic loads. Firstly, we apply Karhunen-Lo$\grave{e}$ve expansion to stochastic Young's modulus and stochastic loads so as to turn the original problem into a system containing a finite number of deterministic parameters. Then we deal with the stochastic field and the space field by $k-$version/$p-$version finite element methods and a hybrid stress quadrilateral finite element method, respectively. We show that the derived a priori error estimates are uniform with respect to the Lam$\acute{e}$ constant $λ\in (0, +\infty)$. Finally, we provide some numerical results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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