中文摘要：

针对多面体粒子组成的散粒体系统，基于离散单元法，建立了每个散粒体的邻居目录，在邻居目录内以射线交叉法判断散粒体间的接触，给出了散粒体系统动力学的仿真方法，有效地实现了对散粒体系统接触碰撞动力学的数值仿真。该方法具有重要的理论价值，可推广应用于众多工程领域的散粒体系统堆积、碰撞动力学仿真。

英文摘要：

Aiming at granular system composed of polyhedral granules, based on discrete element method, the neighbor list is established for each particle. The ray crossing method is applied to the collision detection of polyhedral granules stored in the neighbor list. By these steps, the simulation method for the dynamics of granular system is proposed, which effectively realizes the numerical simulation of the dynamics of granular system. The simulation method has significant theoretical value, which can be used to simulate dynamic process of packing and collision of granular system in numerous engineering fields.