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On side wind stability of rail vehicles: parameter study of cross-sections to minimize the wind loads
2000 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A study of how train cross-sections affect the side wind stability is carried out using CFD (Computational Fluid Dynamics). The basis of the evaluation is a comparison of the aerodynamic force and moment coefficients. It is found that 2D flow simulations show the same trend in results as 3D simulations using cyclic boundary conditions. The following parameterization of the train cross-section is therefore made in 2D. Three different parameters are investigated: The rounding radius of the roof corners, the height of an elliptic shaped roof and the cut off angle of the roof corners. The wind loads on the leading car body of the Gardermoen Airport Express train and the best cross-section found in the parameter study are compared. The same front was used for both of the trains to minimize the front effect on the wind loads. A quasi-static analysis shows that the new train can be 18% lighter than the Gardermoen Airport Express train, which is fully 9 tons of the first coach. The lowered weight will reduce the life cycle cost of the leading train coach in order of one million SEK.

Place, publisher, year, edition, pages
2000.
Keyword [en]
Technology, aerodynamics, fluid mechanics, CFD, side wind stability, trains
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-42613ISRN: LTU-EX--00/151--SELocal ID: 09b74356-7282-4ccf-b7ed-51f867707e3fOAI: oai:DiVA.org:ltu-42613DiVA: diva2:1015836
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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