arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.01064math.AP
收藏

强振荡各向异性介质弹性散射问题的前导和二阶均匀化

Leading and second order homogenization of an elastic scattering problem for highly oscillating anisotropic medium

Yi-Hsuan Lin, Shixu Meng

摘要:

本文研究了有界支撑各向异性周期介质对弹性波的散射问题。应用双尺度均匀化,我们首先得到一个常系数二阶偏微分椭圆型方程,它描述了波的传播的有效或整体波场。我们通过引入互补的边界校正来研究收敛的收敛速率。为了解释由周期性结构引起的色散,我们进一步追求高阶均匀化。然后,我们研究收敛速率,并正式获得一个四阶微分方程,证明了各向异性色散

英文摘要:

We consider the scattering of elastic waves by highly oscillating anisotropic periodic media with bounded support. Applying the two-scale homogenization, we first obtain a constant coefficient second-order partial differential elliptic equation that describes the wave propagation of the effective or overall wave field. We study the rate of convergence by introducing complimentary boundary correctors. To account for dispersion induced by the periodic structure, we further pursue a higher-order homogenization. We then investigate the rate of convergence and formally obtain a fourth-order differential equation that demonstrates the anisotropic dispersion

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。

↑