Highly Nonlinear Wave Propagation in Elastic Woodpile Periodic Structures
Highly Nonlinear Wave Propagation in Elastic Woodpile Periodic Structures
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DOI：
10.1103/physrevlett.114.118002
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发表时间：
2015-03-17
影响因子：
8.6
通讯作者：
Kevrekidis, P. G.
中科院分区：
文献类型：
--
作者：
Kim, E.;Li, F.;Kevrekidis, P. G.
在目前的工作中，我们实验实现，数值计算，并从理论上分析了一个配置的形式，一个单一的列木堆周期性结构。我们的主要发现是，一个赫兹，局部共振，柴堆晶格提供了一个测试床，形成真正的行波组成的强烈本地化孤立波顶部的小振幅振荡的尾巴。这种类型的波，称为纳米翼，不仅是理论上和数值上的动机，但也通过激光多普勒振动计可视化实验。该系统还可以用于随意操纵应力波，例如，在不依赖于系统中的阻尼的情况下实现对高振幅冲击的强衰减和调制。
In the present work, we experimentally implement, numerically compute with, and theoretically analyze a configuration in the form of a single column woodpile periodic structure. Our main finding is that a Hertzian, locally resonant, woodpile lattice offers a test bed for the formation of genuinely traveling waves composed of a strongly localized solitary wave on top of a small amplitude oscillatory tail. This type of wave, called a nanopteron, is not only motivated theoretically and numerically, but is also visualized experimentally by means of a laser Doppler vibrometer. This system can also be useful for manipulating stress waves at will, for example, to achieve strong attenuation and modulation of high-amplitude impacts without relying on damping in the system.