Simulation on Vibration Characteristics of Flat Grain Vehicle based on Multi-body Dynamics Simulation Method

Aiming at the problems of control accuracy reduction and component fatigue damage caused by driving vibration of flat grain vehicle, multi-body dynamics simulation is carried out for the vehicle body under four working conditions of straight running, turning, tilting and climbing in grain depot environment to identify the vibration limit working conditions; The effects of track preload, part spacing between two tracks and the number of driving teeth on the driving vibration degree of vehicle body under extreme working conditions are analyzed respectively. The simulation results show that when the flat grain vehicle is driving, with the increase of track preload, the acceleration amplitude of vehicle body centroid first increases and then decreases; With the increase of the two crawler parts, the acceleration amplitude of the vehicle body centroid first decreases and then increases; With the reduction of driving wheel teeth, the acceleration amplitude of vehicle body centroid increases gradually. The simulation results show that due to the change of three influencing factors of crawler walking mechanism, the vibration of vehicle body has changed obviously and regularly. Therefore, by selecting appropriate values, the vibration of vehicle body can be effectively reduced, which provides a theoretical basis for vehicle body design and optimization.