下沉与倾斜对摇动的干颗粒物质的渗透：基础的作用
Sink vs. tilt penetration into shaken dry granular matter: the role of foundation
摘要：
我们研究的行为，圆柱形的物体，因为他们陷入一个干燥的颗粒床流化由于横向振荡，为了阐明人类的建设和其他对象。有些出乎意料的是，我们发现，在很大的横向震动功率范围内，平底圆柱体垂直下沉，而那些底部有浅环的“基础”的圆柱体，除了下沉外，还会倾斜。当施加足够强的横向振动时，后一种情况似乎独立于基础的性质而占主导地位。我们能够再现所观察到的行为准二维数值模拟，并与入侵者的牛顿运动方程的帮助下的垂直下沉动力学。
英文摘要：
We study the behavior of cylindrical objects as they sink into a dry granular bed fluidized due to lateral oscillations, in order to shed light on human constructions and other objects. Somewhat unexpectedly, we have found that, within a large range of lateral shaking powers, cylinders with flat bottoms sink vertically, while those with a "foundation" consisting in a shallow ring attached to their bottom, tilt besides sinking. The latter scenario seems to dominate independently from the nature of the foundation when strong enough lateral vibrations are applied. We are able to reproduce the observed behavior by quasi-2D numerical simulations, and the vertical sink dynamics with the help of a Newtonian equation of motion for the intruder.
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