Modeling of the Soil-Rigid Wheel Interaction Using Discrete Element Method

Abstract

In this paper the soil-rigid wheel interaction was analyzed using Discrete Element Method (DEM). Three types of soil model were created with different mechanical properties. After that, the rigid wheel was simulated in two different ways: in the first case it was created as a rigid wall and then as a rigid particle. In each calculation the sinkage of the wheel was measured under different vertical loads. After that, the results of the simulations were compared to the theoretical values. To determine the theoretical sinkage values the Bekker-formula was used. Finally the accuracy and the calculation times of the two simulation methods were compared to each other.

U ovom radu je je analizirana interakcija zemlje i krutog točka metodom diskretnih elemenata (DEM). Pripremljena su tri tipa zemljišta sa različitim mehaničkim osobinama. Posle toga, kruti točak je simuliran na dva različita načina: u prvom slučaju kao kruti zid, a zatim kao kruta čestica. U svakom proračunu mereno je propadanje točka pod različitim vertikalnim opterećenjima. Rezultati simulacija su poređeni sa teorijskim vrednostima. Za određivanje teorijskih vrednosti propadanja korišćena je Bekerova jednačina. Na kraju su međusobno poređene tačnost i vreme proračuna dva metoda simulacije.