Collective motion of oscillatory walkers
Collective motion of oscillatory walkers
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振荡步行者的集体运动
DOI：
10.1103/physreve.88.012808
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发表时间：
2013
影响因子：
2.4
通讯作者：
D. Yanagisawa and K. Nishinari
中科院分区：
文献类型：
--
作者：
T. Ezaki;R. Nishi;D. Yanagisawa and K. Nishinari
我们研究了一个相互作用的自推进粒子系统，其行走速度取决于运动周期的阶段。该模型在车辆交通最优速度模型中引入了相方程。我们发现该系统表现出新的流动类型：同步自由流动、相锚定自由流动、有序阻塞流动和无序阻塞流动。前两个流的特征是阶段同步，而其他流则不具有全局同步。其中，无序堵塞流是一个非常复杂的问题，尽管其基础模型很简单。这一现象意味着运动粒子的群体行为可以通过将它们的速度与它们的运动相耦合而变得不稳定。我们还关注“相位锚定”现象。它们强烈地影响系统中的颗粒流动，特别是当颗粒密度较高时。
We study a system of interacting self-propelled particles whose walking velocity depends on the stage of the locomotion cycle. The model introduces a phase equation in the optimal velocity model for vehicular traffic. We find that the system exhibits novel types of flow: synchronized free flow, phase-anchoring free flow, orderly jam flow, and disordered jam flow. The first two flows are characterized by synchronization of the phase, while the others do not have the global synchronization. Among these, the disordered jam flow is very complex, although the underlying model is simple. This phenomenon implies that the crowd behavior of moving particles can be destabilized by coupling their velocity to the phase of their motion. We also focus on “phase-anchoring” phenomena. They strongly affect particle flow in the system, especially when the density of particles is high.