Abstract
The paper presents the mechanical model of a car suspension system. It is used a mathematical model of motion for the case of quarter-car. It is defined the conditions, initial parameters and the mechanical constraints of the suspension system. It is determined the transfer function corresponding to the vibrations of the sustaining and rolling systems in the analyzed case. It is built a block scheme using MATLAB program (Simulink subprogram) corresponding to the mathematical model. Also, it can be studied the mechanical vibrations of suspension in different road conditions. The irregularities of road which influence the car motion are introduced in the block scheme as function input. It is made some numerical simulations for different function input which describe the road shape.
Keywords: Numerical Simulations, Mechanical Vibrations, Suspension