圆环在抛物面上的运动是一种错综复杂的刚体运动，涉及许多晦涩难懂的理论知识．本文首先在实验上呈现了圆环在抛物面上的运动，获得了不同初速度方向时圆环的运动模式，即直线型、三叶草型和螺旋型．通过运动模式构造了在 xy平面内的衰减位移方程，较好的拟合了利用 Tracker软件跟踪圆环获取的实验运动轨迹，并解释了初始速度方向与圆环运动模式之间的内在关联．最后，在纯滚动理论框架内，探讨了特殊运动模式下圆环的角速度．

The motion of a ring on a paraboloid is a complex rigid body motion，which involves many obscuretheoretical knowledges． In this paper，an experiment of the motion of rings on a paraboloid is presented，and the motion modes of rings in different initial velocity directions are obtained，such as linear mode，clover mode，helicalmode． On the basis of fitting the constructed motion equation to the experimental data obtained by tracker software， the relationship between motion modes and the initial direction of velocity of rings isanalyzed． In the frame of rigid body motion theory，the angular velocity of the ring of special motional modes is discussed