Sensitivity of the wheel–rail contact interactions and Dang Van Fatigue Index in the rail with respect to irregularities of the track geometry
| Autor: | Guillaume Puel, Xavier Quost, Régis Cottereau, Alfonso M. Panunzio, Samuel Simon |
|---|---|
| Přispěvatelé: | Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), RATP |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Engineering
Index (economics) InformationSystems_INFORMATIONINTERFACESANDPRESENTATION(e.g. HCI) 02 engineering and technology 01 natural sciences [SPI.GCIV.IT]Engineering Sciences [physics]/Civil Engineering/Infrastructures de transport InformationSystems_MODELSANDPRINCIPLES 0203 mechanical engineering sensitivity analysis 0103 physical sciences Track geometry Sensitivity (control systems) Hardware_ARITHMETICANDLOGICSTRUCTURES Safety Risk Reliability and Quality 010301 acoustics business.industry Mechanical Engineering Structural engineering [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] wheel-rail contact ComputingMilieux_GENERAL Track geometry irregularities 020303 mechanical engineering & transports Automotive Engineering Dang Van fatigue criterion business |
| Zdroj: | Vehicle System Dynamics Vehicle System Dynamics, Taylor & Francis, 2018, 56 (11), pp.1768-1795. ⟨10.1080/00423114.2018.1436717⟩ |
| ISSN: | 0042-3114 1744-5159 |
| Popis: | International audience; This paper investigates the effects of the track geometry irregularities on the wheel-rail dynamic interactions and the rail fatigue initiation through the application of the Dang Van criterion, that supposes an elastic shakedown of the structure. The irregularities are modelled , using experimental data, as a stochastic field which is representative of the considered railway network. The tracks thus generated are introduced as the input of a railway dynamics software to characterize the stochastic contact patch and the parameters on which it depends: contact forces and wheelset-rail relative position. A variance-based global sensitivity analysis is performed on quantities of interest representative of the dynamic behaviour of the system, with respect to the stochastic geometry irregularities and for different curve radius classes and operating conditions. The estimation of the internal stresses and the fatigue index being more time-consuming than the dynamical simulations, the sensitivity analysis is performed through a metamodel, whose input parameters are the wheel-rail relative position and velocity. The coefficient of variation of the number of fatigue cycles, when the simulations are performed with random geometry irregularities, varies between 0.13 and 0.28. In a large radius curve, the most influent irregularity is the horizontal curvature, while, in a tight curve, the gauge becomes more important. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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