arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.08095nlin.PS
收藏

空心椭圆柱链中弥散稀疏激波的演示

Demonstration of dispersive rarefaction shocks in hollow elliptical cylinder chains

H. Kim, E. Kim, C. Chong, P. G. Kevrekidis, J. Yang

摘要:

我们报告了3D打印的中空椭圆柱体软链中色散稀疏激波(DRS)的实验和数值演示。我们发现,与传统的非线性波相比,这些DRS的低振幅分量传播得更快,而高振幅分量传播得更慢。这导致波前的后倾形状(稀疏段)和波尾断裂成调制波形(色散激波段)。在不同的冲击条件下检查DRS,我们发现的反直观的功能,更高的前锋速度导致较慢的DRS的传播。这些独特的功能可以是有用的可控和有效地减轻冲击,而不依赖于材料阻尼或塑性效应。

英文摘要:

We report an experimental and numerical demonstration of dispersive rarefaction shocks (DRS) in a 3D-printed soft chain of hollow elliptical cylinders. We find that, in contrast to conventional nonlinear waves, these DRS have their lower amplitude components travel faster, while the higher amplitude ones propagate slower. This results in the backward-tilted shape of the front of the wave (the rarefaction segment) and the breakage of wave tails into a modulated waveform (the dispersive shock segment). Examining the DRS under various impact conditions, we find the counter-intuitive feature that the higher striker velocity causes the slower propagation of the DRS. These unique features can be useful for mitigating impact controllably and efficiently without relying on material damping or plasticity effects.

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。

↑