Vibrations Concerning with Safety in Vehicle Rolling Conditions

Abstract

This paper is intended as a study of the composition of existing vibrations in the rear of a car, while it is running in order to increase traffic safety. The main factors that cause the occurrence of these vibrations are related to runway irregularities, imperfections of the elements that compose the system running, and the vibrations caused by aerodynamic (CFD predictions) of the shell –as it runs at high speed (i.e. in-between legal limits). Accuracy in terms of the gas-dynamics behavior, implies a CFD analysis with LES model. Predicting the distinct characteristics in relation to sources, follows the influence related to the wheel and respective to body motion. These analyses were done by the use of FFT method, and with the classic procedures in processes controlling–using MATLAB-Simulink. These are analyzed in order to face a common risk of resonance in certain specific conditions, to prevent safety running conditions.