Étude numérique de l'influence de la texture de chaussée sur la résistance au roulement

Abstract : The transport accounts for about 50 percent of the fuel consumption. A significant proportion of energy is lost by the suspension and the deformation of the tyre. One of the important factors in the energy loss is the texture of the road and its interaction with the tyre. The present work deals with the numerical modelling of the contact between a tyre and a road in rolling conditions in order to evaluate the rolling resistance. First, the collision of a sphere and a viscoelastic halfspace is studied. Then the viscoelastic contact of a body rolling on an smooth surface is investigated with a suspension between a mass and the rolling body. Finally a linearised multipoint method is proposed for the study of the rolling contact on a rough surface first without suspension and then with a suspension. The rolling condition is introduced in the model. The rough surfaces are surfaces composed of spherical asperities or real road surfaces. Numerical results reveal an asymmetry in the distribution of the contact pressure in the rolling direction. The rolling resistance force, classically defined as the momentum opposing the rolling divided by the radius of the tyre, is calculated using the distribution of the contact pressure. The effects of different parameters on the rolling resistance force such as the rolling speed, the size of the asperities and the stiffness of the suspension are analysed
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Quoc Huong Bui. Étude numérique de l'influence de la texture de chaussée sur la résistance au roulement. Autre. Université Paris-Est, 2014. Français. ⟨NNT : 2014PEST1008⟩. ⟨tel-01124222⟩

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