arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.04872math.APcond-mat.mtrl-sci
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单元平均双尺度收敛:在周期均匀化中的应用

Cell averaging two-scale convergence: Applications to periodic homogenization

François Alouges, Giovanni Di Fratta

摘要:

本文的目的是引入另一种双尺度收敛的概念,它为具有周期振荡系数的偏微分方程的均匀化提供了一种更自然的建模方法:在消除检验函数的可容许性的麻烦的同时,它简化了所有标准紧性结果的证明,这使得经典的双尺度收敛非常值得关注:证明了$L^2_{\sharp}[Y,L^2(Ω)]$和$L^2_{\sharp}[Y,H^1(Ω)]$中的有界序列相对于这种新类型的收敛是相对紧凑的。突出的优势的概念上的经典均匀化问题的线性二阶椭圆型方程的一阶边界校正型结果也建立。最后,在一个非线性问题上指出了该方法可能存在的缺陷:$\mathbb{S}^2$值平稳调和映射的弱二尺度紧性结果。

英文摘要:

The aim of the paper is to introduce an alternative notion of two-scale convergence which gives a more natural modeling approach to the homogenization of partial differential equations with periodically oscillating coefficients: while removing the bother of the admissibility of test functions, it nevertheless simplifies the proof of all the standard compactness results which made classical two-scale convergence very worthy of interest: bounded sequences in $L^2_{\sharp}[Y,L^2(Ω)]$ and $L^2_{\sharp}[Y,H^1(Ω)]$ are proven to be relatively compact with respect to this new type of convergence. The strengths of the notion are highlighted on the classical homogenization problem of linear second-order elliptic equations for which first order boundary corrector-type results are also established. Eventually, possible weaknesses of the method are pointed out on a nonlinear problem: the weak two-scale compactness result for $\mathbb{S}^2$-valued stationary harmonic maps.

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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