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Highly Nonlinear Wave Propagation in Elastic Woodpile Periodic Structures.
| 题名： | Highly Nonlinear Wave Propagation in Elastic Woodpile Periodic Structures. |
| 作者： | Kim, E.; Li, F.; Chong, C.; Theocharis, G.; Yang, J.; Kevrekidis, P. G. |
| 关键词： | Wave propagation, Traveling waves, Nonlinear systems, Mechanical waves, Waveforms, Frequency, Couplings, Crystals, Photonic crystals |
| 摘要： | 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 are 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 |
| 报告类型： | 科技报告 |
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