On the accuracy of the assessment of open-air pressure loads due to passing trains: Part 2: Assessment by simulation

Passing trains generate aerodynamic loads that cause fatigue on wayside objects and other trains. The European regulatory framework requires, for every rolling stock type, type-tests in which the peak-to-peak pressure changes caused by passing trains are measured close to the track over a range of h...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part F, Journal of rail and rapid transit Journal of rail and rapid transit, 2015-08, Vol.229 (6), p.657-667
Main Authors: Licciardello, Riccardo, Grappein, Etienne, Rueter, Arnd
Format: Article
Language:English
Subjects:
Accuracy
Aerodynamics
Aircraft components
Assessments
Atmospheric pressure
Computational fluid dynamics
Fatigue (materials)
Fluid dynamics
Indicators
Materials fatigue
Mechanical engineers
Simulation
Trains
Uncertainty
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Summary:Passing trains generate aerodynamic loads that cause fatigue on wayside objects and other trains. The European regulatory framework requires, for every rolling stock type, type-tests in which the peak-to-peak pressure changes caused by passing trains are measured close to the track over a range of heights, corrected and processed so as to obtain an assessment value, which is then compared with a limit value. The assessment value is characterized by uncertainty. In this paper we provide quantitative indicators of such uncertainty based on the work carried out in the European FP7 project AeroTRAIN. We compare such accuracy indicators for assessments performed both experimentally, based on the existing process, and through computational fluid dynamics, based on an assessment-by-simulation process proposed in AeroTRAIN. We show how the accuracy of the proposed process can be even slightly better than that of the existing process.
ISSN:0954-4097
2041-3017
DOI:10.1177/0954409715589396