Optimisation of the elastic track properties of turnout crossings

January 1, 2016 in

Journal Paper


Author(s)
Chang Wan
Valeri Markine
Ivan Shevtsov


ISSN
DOI 10.1177/0954409714542478

Theme(s)


Journal
Proc IMechE Part F: J Rail and Rapid Transit


Publishing date:

Keywords
numerical optimisation, railway track design, railway turnout, track stiffness, train-turnout interaction

Link or Download
Not available

Abstract

In this paper, the dynamic performance of a turnout assessed by the level of the dynamic forces acting on the rail (crossing nose), sleeper and ballast is improved by tuning the stiffness and damping of the rail pads and USPs using a numerical optimization method. The improvement of the turnout performance is formulated as single- (based on the crossing nose forces) and combined multi-objective optimisation problems. Optimization problems have been solved using the multipoint approximation method with consideration of homogeneous as well as variable elastic properties along the crossing. Results of the optimization show that application of softer rail pads combined with USPs can significantly reduce the dynamic forces acting on the rails, sleepers and ballast. Moreover, the track elasticity should be varied along the crossing.