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牛顿的碰撞定律为:两球碰撞后的分离速度(或恢复冲量)与其碰撞前的接近速度(或碰撞冲量)成正比;比值k由碰撞体的材质决定,称为恢复系数。即有:k= (u_2-u-1)/(v_1-v_2);式中v_1,v_2,u_1,u_2——两球碰撞前、后的速度。该定律只适合平动碰撞,而且要求碰撞体系动量守恒。 碰撞定律本质的研究由来已久。碰撞过程分为碰撞体变形和弹性变形恢复两个阶段。并
Newton’s collision law is that the separation speed (or recovery impulse) after two-ball collision is proportional to the proximity speed (or collision impulse) before the collision; the ratio k is determined by the material of the collision body and is called the restitution coefficient. That is: k=(u_2-u-1)/(v_1-v_2); where v_1,v_2,u_1,u_2—the speed before and after the collision of the two balls. This law is only suitable for translational collisions, and it requires the momentum of the collision system to be conserved. The study of the nature of the collision law has a long history. The collision process is divided into two phases: collision body deformation and elastic deformation recovery. and