Wheel-rail contact models in the presence of switches and crossings

Hugo Pacheco Magalhaes, Filipe Marques, P Antunes, Paulo Flores, Joao Pombo, Jorge Ambrósio, Aquib Qazi, Michel Sebes, Honore Yin, Yann Bezin

Research output: Contribution to journalArticlepeer-review

Abstract

The development and implementation of wheel-rail contact models in multibody codes are two active research topics, aiming at improving the accuracy of numerical results and computational efficiency of the dynamics analysis. However, the realism of numerical results is challenged when considering switches and crossings (S&C), where the most adverse wheel-rail contact conditions occur. This paper presents a benchmark study where the performance of the multibody codes MUBODyn, VOCO and VI-Rail are assessed using three case scenarios that involve typical contact conditions observed in S&C. A focused description of the relevant methods to determine the wheel-rail contact forces is presented for each software. The three scenarios considered in this work have been designed to represent typical challenging contact conditions observed in S&C, i.e. conformal contact, contact with a sharp edge, and impact loads. The scenarios proposed in this work are fully described, making them easily reproducible. The agreement between results is discussed in the framework of the methods implemented in each code. This work highlights the impact of wheel-rail contact methods on the results as well as on the computational efficiency of the multibody codes.

Original languageEnglish
JournalVehicle System Dynamics
Early online date1 Mar 2022
DOIs
Publication statusE-pub ahead of print - 1 Mar 2022

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