Simulation of Influence of Transverse Wheel-Set Movement on Torsion Oscillations

Abstract

With increasing importance of the railway transport the demands on economic and functional features of the railway traffic increase as well. The features are influenced by many factors, whose identification, direct measuring and impact detection are not easy to obtain in the real service. A computational simulation and a roller rig are suitable means, which enable to recognize an amount of physical limitation influences in conjunction with proposed vehicle construction and with supposed surrounding service conditions make everything clear before a vehicle commissioning. Therefore, the Simulink model, focused on the field of research of traction wheel-sets torsion dynamics and an influence of adhesion conditions, was built, has been used and developed within SGS (Student Grant Competition) and PhD study programs. In the past, the model served for investigation of torsion oscillation excited by changes in torque transfer. In this paper we focus on another source of asynchronous peripheral speed of wheels of a wheel-set. It is given by railway vehicle wheel conicity. It will be shown, how the contact circle diameter change influences the torsion load of the wheel-set axle and the load type.