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The problem of increasing the mobility of tractors on snow in our country is very important. This is due to the long duration of the snow cover, primarily in those regions that are of great national and economic importance in terms of mining. There are many methods to increase the mobility of the vehicle, but all of them are associated with increased traction, as well as bearing characteristics of the wheel. The question of calculating the resistance to movement on the part of the body parts submerged in the snow, as well as transmission and engine for a long time did not receive sufficient attention, despite the fact that their contribution to the overall resistance to movement can reach 60%. In this article the existing methods of calculation and modeling of the value of resistance to movement on the side of housing parts are considered, their advantages and disadvantages are given. The design of a soil canal to study the movement of large-scale models of cars in the snow is considered, and the conclusion is made as to the feasibility of using this method at the present time. The paper also suggests a new method of drag calculation based on the joint use of discrete element modelling (DEM) and multibody dynamics (MBD) software packages. This approach allows both realistically simulate snow due to the discrete element modeling approach, and enter into the model the values of loads on the suspension, traction force, etc. through the use of MBD. The article deals with the technique of modeling the interaction of the body with snow in the EDEM package of DEM Solutions Ltd. The scheme of interaction between DEM and MBD-packages on the example of EDEM and MSC Adams software is described, as well as the technique of using Adams/Co-simulation Interface (ACSI).

Simulation of the process of interaction between the vehicle and snow in the environment of DEM and MBD-systems