PREDICTING THE DYNAMIC BEHAVIORS OF THE RAILWAY VEHICLE USING THE FINITE ELEMENT METHOD AND FUZZY LOGIC
Mustafa Eroğlu Mehmet Akif Koç İsmail Esen Nurettin Gökhan Adar
AbstractThe dynamic behavior of the railway vehicle is an important part of railway transport. Suspension elements affect the dynamic behavior of passenger comfort and railway vehicle components in rail vehicles. In this study, a solid model of 2-degree-of-freedom railway wheels is generated. This model is analyzed with Finite element software. Primary suspension and the ballast elements used in the substructure are used in the finite element model. The primary suspension system reduces the sudden loads from the wagon. On the other hand, the ballast reduces loads by spreading over large areas and absorbing vibrations. In this study, the damping ratio of the primary suspension element is 3 different values (0-39.2-80 Ns/mm) while the ballast spring coefficient is 3 different values (30-65-100 kN/mm) and the ballast damping ratio is 3 different values (0-30-60 Ns/mm). So 27 different analyzes are carried out with the finite element program. As a result of the analysis, the stress of the rail surface, displacement of the rail and the vibration values are determined. A system is formed based on fuzzy logic. Using the fuzzy logic, the dynamic behavior of the railway vehicle for the desired spring and damping values is estimated. The results of the fuzzy logic model and the finite element model are compared, and the fuzzy logic model is accurate up to 90%.