﻿ 基于连续接触力方法的接触碰撞问题研究

# 基于连续接触力方法的接触碰撞问题研究Study on Contact Impact Problem Based on Continuous Contact Force Method

Abstract: For collision with friction, the change of the state of tangential motion of contact point may cause the change of direction and magnitude of the frictional force. The direct use of the traditional instantaneous collision hypothesis may cause the energy inconsistence. Contact-impact model is built based on continuous contact force method. In this model nonlinear damping spring model is used on normal and non-smooth Coulomb friction model is used on tangential. The classic example of oblique impact is a rigid body system consisted by a member bar and ground. Dynamics simulations are done in the process of impact for this classic example. Study the movement variation and the corresponding sliding mode of this system on different friction coefficients, different initial velocity and different initial configuration. With this model, the complex tangential sliding mode during the impact process is demonstrated, which provide the basis for the choice of the collision model.

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