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Research topic: Optimisation of train-track interaction at railway switches and crossings (S&C, or turnout)

  • Numerical simulation of dynamic train-turnout interaction
  • Experimental and numerical damage investigation of S&C
  • Simulation of stochastic train-track interaction
  • Optimisation of rail geometry for crossings
  • Optimisation of track elasticity for crossings
  • Optimisation of grinding/welding maintenance at crossings

Optimisation of wheel-rail interface in railway crossings

Due to the discontinuity in the rail geometry introduced in the crossing nose, railway crossings experience high impact loads from passing vehicles, which makes them sensitive to several types of damage. Dynamic interaction between a train and a railway turnout depends on a large number of parameters related to the nominal design and the current conditions of both systems. For a given turnout design, there exists wide variations with respect to the geometry and material properties of the specific turnout  and loads from the passing trains, such as types of trains (passenger and /or freight), wheel profiles, wheel diameters , axle loads and train speeds. The goal of the research project is to develop numerical tools to get better understanding of vehicle-turnout interaction and to find out possible parameters that could be modified with the ultimate goal to improve crossing design and maintenance. A combination of numerical models for assessment of the turnout-vehicle performance such as the 2D FEM model DARTS_NL, the 3D MBS model, and the numerical optimisation tools were used. Moreover, experimental analysis of vehicle-track interaction and validation of numerical models and simulation results were performed through field measurements on instrumented crossings. To combat damages at crossings due to dynamic impact, the effect of rail geometry, track elasticity, wheel profile, as well as irregularities on the track were assessed, based on which the improvement of crossing designs has been obtained by adjusting the rail geometry and the track elasticity, respectively.

Performance Optimised Geometry of Railway Crossings: Design and Implementation
April 29, 2016
by Valeri Markine, Chang Wan

Robust optimisation of railway crossing geometry
February 17, 2016
by Chang Wan, Valeri Markine , Rolf Dollevoet

Optimisation of the elastic track properties of turnout crossings
January 1, 2016
by Chang Wan, Valeri Markine , Ivan Shevtsov

Improvement of vehicle-turnout interaction by optimising the shape of crossing nose
January 1, 2016
by Chang Wan, Valeri Markine , Ivan Shevtsov

Parametric study of wheel transitions at railway crossings
October 12, 2015
by Chang Wan, Valeri Markine

Analysis of train/turnout vertical interaction using a fast numerical model and validation of that model
May 24, 2013
by Chang Wan, Valeri Markine , Ivan Shevtsov

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Chang Wan, MSc

PhD Researcher

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