Tire-soil relationship is an important research topic in terramechanics. In this paper, a tire-soil interaction model considering soil cohesion is established based on discrete element method (DEM). Through the coupling of EDEM and RecurDyn, the traction characteristics of tire under different slip ratio and the same load were studied, and the microscopic behavior of the particles was analyzed. The results show that with the slip ratio increasing from 0% to 75%, the value of the drawbar pull increase from about -1000N to about 2000N and the relative motion of particles becomes more and more violent.
The steering problem of multi axle vehicles in sandy soil has always been an important issue in terra-mechanics. Numerical simulation method has become an important research method to study the vehicle-terrain contact problems. In this paper, the discrete element method is used to establish the sandy soil pavement model, and the multi-body dynamics method is used to establish the vehicle body model. The coupling of two methods are used to carry out the driving simulation of multi axle vehicles on sandy soil pavement, and the force of tires and the speed and trajectory of vehicles are analyzed. The results show that the DEM-MBD coupling method has great application prospects in vehicle-terrain simulation.
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