中文摘要：

采用颗粒离散元法模拟得到卧式行星磨磨筒内钢球平均接触力大小以及随填球率、钢球直径、磨筒半径和公转半径的变化规律，并与实验结果进行了比较分析。结果表明：行星磨的粉磨速率可以由平均接触力大小来确定，粉磨速率的对数是平均接触力线性函数，斜率为0．087。磨筒填球率的增加，导致钢球的平均接触力减小；随着钢球直径、磨筒半径、公转半径的增大，平均接触力呈线性增长，斜率分别为2．5，0．14，0．03，其中钢球直径对平均接触力的影响最大。

英文摘要：

Simulation of the mean contact force of grinding balls in the horizontal planetary ball mill and relation between the mean contact force and factors including ball filling ratio, grinding ball diameter, milling pot radius and revolution radius were done using the distinct element method for particle system, and with the experimental results for comparative analysis. The results show that the grind- ing rate of the horizontal planetary ball mill can be determined by the mean contact force, logarithm of the grinding rate is linear function about the mean contact force and the gradient is 0. 087. With fill rate increasing, the mean contact force of grinding balls decreases gradually; the mean contact force of grinding balls increases linearly with the grinding ball diameter, milling pot radius and revolution radius, and the gradient is 2.5, 0.14 and 0.03 respectively, the grinding ball diameter is primary factor, meanwhile.