Approximation of Polyatomic FPU Lattices by KdV Equations

Approximation of Polyatomic FPU Lattices by KdV Equations
复制标题

通过 KdV 方程逼近多原子 FPU 晶格

DOI:
10.1137/130941638
复制
发表时间:
2014
期刊:
Multiscale Model. Simul.
影响因子:
--
通讯作者:
Qimin Zhang
Qimin Zhang
中科院分区:
--
文献类型:
--
作者:
J. Gaison;Shari Moskow;J. D. Wright;Qimin Zhang

文献摘要

参考文献

被引文献

相似文献

考虑材料性质周期性变化的多原子Fermi-Pasta-Ulam格点微分方程解的小振幅、长波长初始数据的演化。利用齐次化理论的方法,我们证明了解分解为两个适当缩放和调制的反向传播波的线性叠加的严格估计,其中每个波求解一个Korteweg-de Vries方程,加上一个小误差。这些估计在很长的时间尺度上都是有效的。
We consider the evolution of small amplitude, long wavelength initial data by a polyatomic Fermi--Pasta--Ulam lattice differential equation whose material properties vary periodically. Using the methods of homogenization theory, we prove rigorous estimates that show that the solution breaks up into the linear superposition of two appropriately scaled and modulated counter-propagating waves, each of which solves a Korteweg--de Vries equation, plus a small error. The estimates are valid over very long time scales.
DOI: 10.3934/dcdss.2012.5.879
发表时间: 2012
期刊: Discrete and Continuous Dynamical Systems - Series S
影响因子: --
作者:
Martina Chirilus-Bruckner;Christopher Chong;Oskar Prill;Guido Schneider
通讯作者: Guido Schneider