An efficient approach to the analysis of rail surface irregularities accounting for dynamic train–track interaction and inelastic deformations
Artikel i vetenskaplig tidskrift, 2015

A two-dimensional computational model for assessment of rolling contact fatigue induced by discrete rail surface irregularities, especially in the context of so-called squats, is presented. Dynamic excitation in a wide frequency range is considered in computationally efficient time-domain simulations of high-frequency dynamic vehicle-track interaction accounting for transient non-Hertzian wheel–rail contact. Results from dynamic simulations are mapped onto a finite element model to resolve the cyclic, elastoplastic stress response in the rail. Ratcheting under multiple wheel passages is quantified. In addition, low cycle fatigue impact is quantified using the Jiang–Sehitoglu fatigue parameter. The functionality of the model is demonstrated by numerical examples.

dynamic vehicle-track interaction

squats

RCF

rail surface irregularities

Författare

Robin Andersson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Peter Torstensson

Dynamik

Elena Kabo

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Vehicle System Dynamics

0042-3114 (ISSN)

Vol. 53 11 1667-1685

Ämneskategorier

Tribologi

Beräkningsmatematik

Farkostteknik

Styrkeområden

Transport

DOI

10.1080/00423114.2015.1081701

Mer information

Skapat

2017-10-07