Research On Damping Characteristics Of All-terrain Rubber Suspension System

China is a vast country with frequent earthquakes,mudslides and other natural disasters,and traditional vehicles cannot enter the rescue area in time.However,the tracked all-terrain vehicle has the advantages of high passability and mobility,which can move at a high speed in a variety of complex terrain and harsh environment,such as deserts,polar regions and marshes.But the vibration and impact from uneven ground is very prominent,which seriously affect the driving comfort and the life of the machine.Therefore,it is urgent to study the damping and vibration reduction of the walking mechanism of the tracked ATV.The rubber torsion suspension device of a tracked ATV is the research object and the torsional complex stiffness of the rubber torsion spring is equivalent to the vertical complex stiffness and the damping coefficient of the hydraulic shock absorber of the first pair of suspension is equivalent to the vertical damping coefficient in this paper.A semi-vehicle damping system model of "road-all-terrain vehicle-driver" was established,then the damping material and structural characteristics of rubber torsion suspension are analyzed and the structural loss factor is obtained.The performance of damping and damping system of tracked allterrain vehicle is analyzed under different road profiles and speeds,,and the speed corresponding to the road level meeting the driver’s comfort requirements is obtained.Based on the original rubber torsion suspension parameters,by increasing and decreasing the suspension parameters,and comparing with the original parameters,it is found that increasing the suspension stiffness increases the vibration acceleration of the car body at the seat of the cab,and the vibration damping performance of the vehicle decreases.When the loss factor of the rubber torsion spring is increased,the vibration acceleration of the car body at the seat of the cab decreases,and the vertical displacement of the car body decreases.With the increase of the damping coefficient of the hydraulic shock absorber,the peak value of the dynamic deflection of the vehicle suspension is reduced,the vibration of the vehicle is weakened,and the dynamic load of the first group of support wheels is reduced,which provides some reference for the design of allterrain vehicle suspension.