Metamodel for elasto-plastic wheel–rail contact with application to damage in a railway crossing
Paper i proceeding, 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.

Vehicle dynamics

contact mechanics

switches & crossings

metamodel

S&C

Författare

Rostyslav Skrypnyk

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Björn Pålsson

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Jens Nielsen

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Magnus Ekh

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

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,

Ämneskategorier

Tribologi

Teknisk mekanik

Farkostteknik

Styrkeområden

Transport

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Mer information

Senast uppdaterat

2018-09-21