Performance Optimised Geometry of Railway Crossings: Design and Implementation

April 29, 2016 in

Journal Paper


Author(s)
Valeri Markine
Chang Wan


ISSN 2049-5358
DOI 10.4203/ijrt.5.2.1

Theme(s)




Journal
International Journal of Railway Technology
Volume 5, Issue 2, Pages 25

Publisher: Safe-Coburg Publications
Publishing date: April 29, 2016

Keywords
crossing geometry optimisation, instrumented turnout, railway crossings, wheel/rail contact

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Abstract

The paper presents an optimisation procedure for improvement of crossing performance by adjusting the crossing (including the wing rail) geometry. The improvement of the crossing performance is achieved by reducing the normal contact pressure and wear index, while shifting the location of the wheel impact (fatigue area) along the crossing. By shifting the fatigue area, the life of the crossing can be prolonged.

To demonstrate the proposed procedure, the geometry of a crossing (crossing angle 1:15) has been optimised. The effect of two typical wheel profiles used on the considered crossing is taken in to account during the optimisation. The robustness of the obtained geometries has been verified using the numerical simulations with track geometrical irregularities.

Using the optimisation procedure, two improved geometries of the crossing have been obtained. In both designs, the normal contact pressure was reduced as compared to the reference design, while the fatigue area in the second crossing was shifted further from the tip point of the crossing, as compared to the first crossing. Importantly, the second crossing geometry can be obtained from the first crossing simply by grinding.

To implement the new crossing geometry, a new measurement device has been proposed. The device can be used for the assessment of wear to the existing crossings, and during adjusting/restoration of the crossing geometry.

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