COMPARATIVE STUDY ON THE DYNAMIC AXLE LOADS AND ON THE DYNAMIC WHEELS LOADS OF DIFFERENT CLASSES CARS
Abstract: Determination of the dynamic axle loads and wheels loads of the passenger cars is necessary due to their influences on the gripping forces, the conditions at which the stability of the car can be lost, as well at the design stage of the passenger cars, with influence on the braking system, on the axles, but also on their suspension. By comparing the dynamic loads on different classes of the passenger cars, it aims to highlight the parameters which influence the dynamic loads and parameters that influence the maximum grip force. The study of the paper includes: the choice of three different classes of passenger cars and one representative passenger cars for each class considered, in order to determine their dynamic loads; performing the experimental measurements on the determination of the static normal loads on the wheels/axles of the three cars under consideration in order to determine the position of the center of gravity for each of them; the development of numerical modeling to result in dynamic loads, the maximum grip force and the dynamic coefficients for the three passenger cars in different operating situations (starting, braking and in cornering) and for different natures and conditions of the road, respectively different longitudinal and transverse inclination of the road, as well as the comparison of the obtained results with the emphasis of the parameters that have an influence on them. The results are interpreted graphics, enabling a comparative study of them.
Key words: passenger car, driving axle, dynamic load, numerical modeling, cornering
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