Abstract
It is important to understand the dynamic behavior of a wheel under running condition on the off-road to estimate the tire-soil interaction. The discrete element method is widely used to analyze the dynamic behavior of a wheel driven on a sandy road. A contact method between a wheel and numerous particles was developed to carry out simulation. A wheel testbed experimental setup was established for investigating the contact phenomenon between a wheel and sand particles. A high speed camera was used to capture the motion of the wheel. A clustering model for generating arbitrary shape of a particle was developed. The technique for solving multibody dynamics and particle dynamics simultaneously was suggested. The vertical motion of the wheel by computer simulation was compared with experiments. According to results, the relative error and the root mean square error of the vertical displacement are 5.55 % and 6.05 %, respectively. Simulation results show a good agreement with experiments.
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