THE EVALUATION OF NORMAL LOAD REDISTRIBUTION ONTHE STATIC AXLES AND ON THE WHEELS, WHEN THE VEHICLE IS IN MOTION

The knowledge of the normal reaction to the car axles is required to determine its gripand for the study of braking and stability issues during his movement. The size of the reaction is influenced by the conditions of movementand constructive parameters of the the vehicle. The vehicledynamic axles loads are studied because they have influences on the grip forces and for the study of braking problems and stability during the movement. During the vehicle exploitation , the wheels grip forces with greater dynamic load will increase and those with lower dynamic load will decrease, having direct influence on their stability. For the assessment of the normal static axle load redistribution, when the vehicle is in motion, in various situations of exploitation, resort to: conducting the experimental measurements concerning the determination of the normal static axle load for different situations of the vehicle load; determining the center of gravity for considered loading situations; development of a numerical calculation model in MathCad that gives the results with graphic interpretation of dynamic loads of the vehicle axles, maximum grip force, dynamic change coefficients of thenormal reaction of vehicle axlethat takes into account the constructive parameters of the vehicle, various travel modes (start, stop, cornering), geometry, nature and condition of the road, etc.