关键词: 车辆失速；碰撞防护；车辆加速度；车辆碰撞模型

Abstract: The dynamics in the forward collision of a sliding vehicle are analyzed to explain the necessity of installing protective devices in mine tunnel in this paper. The acceleration of the sliding vehicle and the speed before the collision are deduced through the force analysis of the sliding vehicle in the mine tunnel using Newtonian mechanics. Both unprotected and protected vehicledriver collision models are developed to simplify the collision constraint relationship among vehicle, driver and wall and construct the vibration system between vehicle and hit target. The two collision models are simulated by MATLAB/Simulink under the conditions of mine tunnel inclination of 6°, vehicle weight of 2 600 kg, driver weight of 70 kg and sliding distance of 50, 100, 150 m and 200 m. The results show that the use of protective devices can reduce the maximum acceleration of the vehicle and the driver by 25.5% and 12.0%, respectively, compared with no protective device, and can play a protective role in the sliding distance of the vehicle within 100 m.

Key words: vehicle sliding; collision protection; vehicle acceleration; vehicle collision model