Metamodel for elasto-plastic wheel–rail contact with application to damage in a railway crossing
Paper in proceedings, 2018

A cross-disciplinary and iterative simulation methodology, integrating several numerical tools, for predicting the long-term damage in rail profiles of a railway crossing is described. To reduce computational effort, two simplifications are introduced: (i) To accurately represent traffic conditions in the field, a load collective accounting for statistical distributions of worn wheel profile, vehicle speed and wheel–rail friction coefficient is generated by Latin hypercube sampling and used as input in multibody simulations (MBS) of vehicle–track dynamic interaction. (ii) Based on the output from the MBS simulations, a tuned Hertzian-based metamodel for wheel–rail normal contact accounting for elasto-plastic material behaviour is applied to calculate the contact stress and contact patch size at discretized positions along and across the crossing rail. The metamodel allows for a vast reduction of simulation time compared to the original finite element model as it is given in analytical form.

metamodel

Vehicle dynamics

contact mechanics

S&C

switches & crossings

Author

Rostyslav Skrypnyk

Chalmers, Mechanics and Maritime Sciences, Dynamics

Björn Pålsson

Chalmers, Mechanics and Maritime Sciences, Dynamics

Jens Nielsen

Chalmers, Mechanics and Maritime Sciences, Dynamics

Magnus Ekh

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Dynamics of Vehicles on Roads and Tracks

705-710

Proceedings of the 25th International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD 2017)
Rockhampton, Australia,

Subject Categories

Tribology

Applied Mechanics

Vehicle Engineering

Areas of Advance

Transport

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

More information

Latest update

8/9/2019 1