Prediction of dynamic train–track interaction and subsequent material deterioration in the presence of insulated rail joints

Abstract

Numerical analysis of high-frequency dynamic train–track interaction is combined with the analysis of material deterioration in terms of rolling contact fatigue (RCF) and plastic deformations to analyze the influence of insulated rail joints. These joints form local rail irregularities and lead to a local change of dynamic track stiffness. Dynamic responses at wheel passes are evaluated. Further, related plastic deformations at the joint and increased RCF impact along a stretch of the track adjacent to the joint are predicted.

Keywords:

• Dynamic train–track interaction
• Material deterioration
• Rolling contact fatigue
• Insulated rail joint
• Finite element simulations
• Plastic deformations

Acknowledgements

The work has been carried out within the Center of Excellence CHAlmers Railway MEChanics (CHARMEC). The current activities were initiated by Tamara Gronowicz and Björn Paulsson of Banverket. Björn Eriksson and Lennart Lundfeldt of Banverket performed the field measurements.