Design and simulation of railway vehicles braking operation using a scaled roller-rig

摘要

A 1:5 scale roller-rig has been recently realized at Politecnico di Torino for the simulation of railway dynamics. In this work it is shown that it is possible to reproduce the braking dynamics of a railway vehicle on the roller rig. For this purpose a disk-brake braking system has been designed that can be installed on the existing bogie. The inertia of the vehicle can easily be simulated adding inertia to the rollers, so that the braking distance can be evaluated on the basis of the angular displacement of the rollers. Design and optimisation of the system has been carried out with the aid of a numerical multibody model, in which different friction laws have been implemented. The simulations have been performed varying the running conditions (friction coefficient, axle load, velocity).