Mathematical model of the straight-line rolling tire - Rigid terrain irregularities interaction

Abstract

The article discloses a semi-empirical model of the zero-camber straight-line rolling tire - rigid terrain irregularities' interaction. Tire enveloping properties are modeled by a system of radial springs. During validation of the model, the authors compared the experimental and computed tire I-247 static load - deflection curves for the step and triangular prisms. The comparison showed that the model gives radial reactions which are lower than the experimental ones. The authors developed the method for the model correction based on the analysis of the tire - terrain overlap in the contact area at each calculation step. After the correction, the model showed a good accuracy for the tire I-247 deflected on the step and on triangular prisms. The authors plan to use the developed model for analysis of the cross-country capacity and dynamic loads of a wheeled vehicle driving across offroad obstacles.