Vibration Reduction on Overhead Contact Rails: a Simulation-Optimization Approach

Abstract

The use of overhead contact rail systems in rail transport has been favoured by the need of having an electrification system that allows its installation where space is limited.The displacement of a train pantograph running through a railway line causes an oscillating movement on the contact line. The overhead contact rail systems or rigid catenary, due to its characteristics, describes a movement with greater inertial forces than the equivalent flexible overhead contact lines. The main consequence is that at higher speeds larger variations in the contact force between pantograph and catenary wires occur, leading to contact loses and producing electrical arcs.Results obtained in the study developed on the implementation of stiffness compensation systems are described on this paper. Simulations demonstrate that it is feasible to reduce the effects of the movement described by the overhead contact rail's beam. This opens a new investigation field focused on develop the most efficient configuration for alternative overhead contact rail solutions.

Static Contact Modelling and Analysis for Rail Grinding with Abrasive Belt

“…Inspired by the prominent role of finite element model in the field of engineering [17][18][19], we analysed the influence of grinding process and contact wheel's parameters on contact behaviour. Firstly, rail grinding with abrasive belt is introduced, including the principle of rail grinding with abrasive belt and the contact behaviour.…”