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Automotive handling on wet surface : dynamic analysis and tyre grip sensitivity

Blase, François ; Matout, Steve
(2024)

Files

Blase_38261900_Matout_54671800_2024.pdf
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Details

Supervisors
Fisette, Paul ; Docquier, Nicolas
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil mécanicien, à finalité spécialisée
Abstract
In a world where road traffic is increasing year-on-year, road safety is extremely important. In particular, the handling behaviour on a wet road and its sensitivity to tyre characteristics is an issue that interests car manufacturers. The purpose of this thesis is to analyze the dynamic behaviour of a road car on a wet surface and the impact of different tyre characteristics, including the cornering power, the grip amplitude and the lateral dynamic friction coefficient. The study is carried out through multibody numerical simulations, using Robotran software developed at UCLouvain. It also implies the modelling of a given passenger car based on real data and the fit of a tyre/road contact model. The analyses are performed based on three main axes, namely the steady-state behaviour, the car’s response at its grip limit and the dynamic reaction of the vehicle to an acceleration or braking. Each analysis shed a light on specific effects of each tyre characteristic tested. The principal results of these various analyses have demonstrated the significant impact of tyre characteristics on car’s behaviour. This confirms the relevance of this study. Each tyre characteristic studied has presented a different influence on the dynamic behaviour of the car.