考虑摩擦作用的多柔体系统点--面碰撞模型

提出了考虑摩擦作用的多柔性体系统的点－面碰撞模型,基于Ｈｅｒｔｚ接触理论和非线性阻尼项描述法向碰撞接触过程的动力学特性,利用线性届接触刚度考虑碰撞过程中的摩擦作用。针对作大范围回转运动的柔性梁与一固定斜面发生碰撞的情况,在考虑刚柔耦合效应的多柔性系统动力学建模理论的基础上,精细研究了系统斜碰撞过程中的动力学行为。

The Point-Surface Impact Model Considering the Friction Effect In Flexible Multi-body System

For correctly estimating the change of the system dynamic property duo to impact, the point-surface impact model considering the friction effect is established in this paper. The normal contact model is based on the Hertz theory and non-linear damping term. The tangential contact model is developed adopting linear tangential contact stiffness to consider the effects of friction force during impact process. The consistent linear dynamic model including impact process for a flexible beam undergoing large overall motion impacting a fixed slope surface under the effects of gravity is derived,which considered the coupling effects of rigid movement and flexible deflection by adopting the mode assumption method. The dynamic property of the flexible beam during oblique impacting process is correctly and minutely studied by simulation.