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Quasistatic modelling of wheel-rail reaction due to crosswind effects for various types of high-speed rolling stock
2004 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, Vol. 218, no 2, 133-148 p.Article in journal (Refereed) Published
Abstract [en]

This work describes a quasi-static tool developed to assess the performance swiftly of crosswind stability for three types of rolling stock with conventional, semi-trailer and Jacobs bogie running gear configurations. The prediction accuracy of the results returned by the tool for the quasistatic assumption is fair in comparison with results of more advanced multibody simulation software that is commercially available. The codes, which are based on steady equilibrium equations for the wheels and axles, bogie frames and vehicle body/bodies, handle arbitrarily canted embankments and circular curves. To a large extent the accuracy hinges on the bodies' lateral displacements relative to the contact points between the wheels and rails; therefore proper modelling of the suspension systems and bump stops are found to be important. Examples are given of the limitations associated with the quasi-static approach, studying the following: (a) the combined wind and track scenario in Deutsche Bahn AG's guideline, (b) the effects of typical track irregularities for high-speed transportation as a function of train speed and (c) the effects of oscillating crosswind. It has also been found relevant to demonstrate some of the large differences regarding provisions regulating crosswind safety. To this extent the present results are compared with those derived with the British Group Standard and also with results presented in the guideline of Deutsche Balm AG. In addition, examples are given of the differences found of the permissible crosswind speed using calculated (with CFD-RANS) and experimentally obtained aerodynamic loads.

Place, publisher, year, edition, pages
2004. Vol. 218, no 2, 133-148 p.
Keyword [en]
aerodynamics, vehicle dynamics, safety, wind tunnel experiments, computational fluid dynamics (CFD)
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-6368DOI: 10.1243/0954409041319614ISI: 000222763200005OAI: oai:DiVA.org:kth-6368DiVA: diva2:11061
Note
QC 20110118Available from: 2006-11-21 Created: 2006-11-21 Last updated: 2012-04-04Bibliographically approved
In thesis
1. Studies of Two Aerodynamic Effects on High-Speed Trains: Crosswind Stability and Discomforting Car Body Vibrations Inside Tunnels
Open this publication in new window or tab >>Studies of Two Aerodynamic Effects on High-Speed Trains: Crosswind Stability and Discomforting Car Body Vibrations Inside Tunnels
2006 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2006. viii, 74 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2006:81
Keyword
train aerodynamics, external aerodynamics, tunnel aerodynamics, computational fluid dynamics
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-4174 (URN)
Public defence
2006-11-23, Sal F3, KTH, Lindstedtsvägen 26, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20110118Available from: 2006-11-21 Created: 2006-11-21 Last updated: 2011-01-18Bibliographically approved

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Stichel, Sebastian

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