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利用离散元方法模拟了均匀球形颗粒的随机排列过程．在模拟过程中考虑了重力、颗粒间的接触力、摩擦力以及范德华力（VDWI）；颗粒的运动包括平动和转动．研究表明，颗粒间的作用力对球形颗粒随机排列体的结构影响很大．对于粒径为100μm球形颗粒，如果不考虑颗粒之间的摩擦力和范德华力，排列体为随机密排和有序密排的混合体，其排列密度为0．8696；考虑颗粒间的摩擦力和范德华力：排列密度降低为0．8213．描述了排列体几何结构随时间的演化过程、特定颗粒在排列过程中的运动轨迹及颗粒配位数的分布规律．同时给出了不同条件下二元系的排列结果．
The discrete element method was used to simulate the random arrangement of uniform spherical particles. Gravity, interparticle contact force, friction and VDWI were taken into account during the simulation; particle movement included translation and rotation. The research shows that the interaction between particles has a great influence on the structure of random arrangement of spherical particles. For the spherical particles with particle diameter of 100μm, if the friction between the particles and van der Waals forces are not considered, the arrangement is a mixture of random and intimate arrangements with an array density of 0.8696; considering the friction between the particles And van der Waals forces: the density of the array is reduced to 0.8213. The evolution of geometric structure of the array with time, the trajectory of the specific particles in the process of arrangement, and the distribution of particle coordination number are described. At the same time, the arrangement of binary systems under different conditions is given.