Multi-criteria evaluation of wheel/rail degradation at railway crossings
Zilong Wei (TU Delft - Railway Engineering, China Academy of Railway Sciences)
Alfredo Núñez (TU Delft - Railway Engineering)
Xiubo Liu (China Academy of Railway Sciences, Infrastructure Inspection Research Institute)
R.P.B.J. Dollevoet (TU Delft - Railway Engineering)
Z. Li (TU Delft - Railway Engineering)
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Abstract
This study evaluates the degradation of wheels and rails at railway crossings. The evaluation method is composed of 1) finite element simulation of dynamic wheel/crossing interaction and 2) multi-criteria analysis of wheel/rail degradation in terms of yield behavior, rolling contact fatigue (RCF) and wear. With the aid of this method, we conducted a case study identifying the proper yield strength of rail steel material for a 54E1-1:9 crossing under a specified traffic condition. The case study indicates that the wear of contact bodies is more sensitive to train speed compared with yield and RCF; the increase of rail yield strength suppresses rail degradation while exacerbating wheel degradation; and rail yield strength in the range of 500–600 MPa is preferred to achieve a good trade-off between the wheel and rail degradations.
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