振动颗粒层沉降的离散元研究：接触损失和加速度的作用
A discrete element study of settlement in vibrated granular layers: role of contact loss and acceleration
摘要：
本文研究了散粒体在周期性外激励下的振动问题。它突出了加速度对沉降速度的影响，并证明了在振动作用下部分受限的粒状材料中存在沉降和接触损失之间的关系。数值模拟采用分子动力学方法，其中离散单元由多边形颗粒组成。数据分析基于多变量自回归模型进行，以描述沉降和永久接触数与加载循环次数的关系。
英文摘要：
This paper deals with the vibration of granular materials due to cyclic external excitation. It highlights the effect of the acceleration on the settlement speed and proves the existence of a relationship between settlement and loss of contacts in partially confined granular materials under vibration. The numerical simulations are carried out using the Molecular Dynamics method, where the discrete elements consist of polygonal grains. The data analyses are conducted based on multivariate autoregressive models to describe the settlement and permanent contacts number with respect to the number of loading cycles.
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