A new mathematical model of the behaviour of a four-axle freight wagon with UIC single-link suspension

Abstract

This paper analyses the lateral dynamic behaviour of a four-axle freight wagon with Union Internationale des Chemins de fer (UIC) single-link suspension where dry friction is used to damp oscillations. Mathematical models of the standard UIC single-link suspension have been prepared elsewhere according to non-smooth mechanics assumptions and implemented into established MBS programs. Numerical simulations of the motion of the four-axle freight wagon with a 200 kN static axleload have been performed on straight track according to methods appropriate for predicting the dynamic stability of freight wagons.

A Gao beam subjected to a moving inertial point load

“…Moreover, the dynamic properties and responses were not influenced by the additional inertia of the wheel sets, which are invariably present in transportation applications. Indeed, their mass is about 750 kg per wheel and, thus, cannot be neglected; see for example [3, 4]. Second, the axial forces in rails were too simple.…”