Optimization of Springs Applied in Vehicle Suspension Structure

In this paper the grapho-analytical optimization of compressed helical cylindrical springs with two design variables and the optimization by RVA algorithm of laminated springs with four design variables are shown. For the helical spring the 3D model of the assembly of the spring into a car suspension system is built and the model is analysed in a finite element program system and a demonstration example is shown for graphical and analytical optimization of the spring. Regarding the RVA optimization algorithm, the iteration history curve is analysed, finding the effects of the parameters in the equations of the curves. It is possible to continue this analysis with the study of the derivatives or integrals of these saturation type curves, the results of which could give very interesting and useful points of view for the "numerical experiments" process to set the best values of the parameters influencing the algorithm thinking. On the basis of these results a new system for comparison and qualification can be developed, which can be used in other fields too (comparison of student groups, competitions, applicants for several funds, grants or jobs, etc.).