SIMULATION OF FLEXIBLE WHEEL SET

Diğer Ülkelerdeki Kamu Kurumları Tarafından Desteklenmiş Proje, 2022 - 2022

Multibody models for the study of the vehicle-track interaction used by railway companies

consider mainly rigid components. These models are characterized by small number of

degrees of freedom allowing real time calculations in low frequency ranges, but these

models do not properly estimate real interaction forces because of the strong hypothesis

of the components’ rigidities. These models need to be improved by taking into account

the components’ flexibilities by coupling finite elements analysis with multibody dynamics

simulations. The main objective of this study is to develop the multibody models of a

railway vehicle and track with flexible wheelsets and flexible rails in order to improve the

prediction of vehicle-track interaction forces. Finite Element (FE) models of wheelset and

track are developed and reduced using model reduction methods to reduce their number

of degrees of freedom before their integration in the multibody models. Different

configurations of vehicle and track models with flexible wheelsets and flexible rails are

considered to evaluate the effect of components flexibilities on the contact forces. The

use of these models can have an important impact in railway applications and their

validation represents a crucial step. This is why, the evaluation of simulated results with

other analytical approaches as well as with real measurements is fundamental. The

Bezgin Method is one of the considered cases that SNCF would like to study.