关键词: 履带式, 全地形车辆, 离散元法, 颗粒仿真, 爬坡性能, 稳定性

Abstract: In order to optimize the climbing characteristics of tracked ATV and improve the adaptability of tracked ATV to complex terrain, a DEM-MBD coupling model based on RecurDyn and EDEM is established by using the coupling algorithm of discrete element method (DEM) and multibody dynamics (MBD). Combined with orthogonal experimental design method, the influence law of road type, vehicle centroid position, ground length and speed coupling on vehicle climbing ability and stability was studied. The results show that the influence weights of all factors on the climbing ability of tracked ATV are as follows: speed>xdirection centroid coordinate>road type>ground length>ydirection centroid coordinate. Based on orthogonal test theory, the best combination of climbing ability is as follows: gravel pavement, center of mass position x=200, y=400, ground length 1 100 mm, speed 5 km/h. When the running speed of this type of vehicle is 0-5 km/h, increasing the speed and moving forward the center of mass is conducive to improving the vehicle's climbing ability. The vehicle is more stable under conditions of low speed, sandy terrain and large ground specific pressure.

Key words: crawler type, allterrain vehicles, discrete element method, particle simulation, climbing performance, stability