钢球在旋转圆筒内的滚动浅析

对钢球在圆筒内不同条件下的运动进行了分析并进行了实验观察。理论分析表明，多个单排钢球与单个钢球在圆筒内获得匀速运动的条件基本相同，必须具有一定的角速度和角加速度。圆筒内钢球数量较多时，存在着钢球之间的滚动或滑动。实验观察表明，当圆筒内同时存在钢球与粉末时。在较低的速度下粉末随筒壁均匀旋转，钢球则在原堆积部位来回滚动。

Analysis on Movement of Steel-Bolls in the Rotational Cylinder

this paper analyses the movement of steel-balls in a cylinder at different conditions based on the experimental observation. The analysis shows that the movement of single ball and several balls, which arrange one rank along the cylinder wall, both basically need the same condition for getting constant speed within cylinder. Cylinder should have certain angular velocity and start acceleration. If many steel- balls are put into the cylinder, the roll and slide movement would occur. The experimental observation shows that when steel-ball and powder co-exist in a cylinder rotating at low speed, the powder would rotate with the wall of cylinder in constant speed, but the steel-balls would roll back and forth at the initial position.