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Vehicle dynamics of...
Vehicle dynamics of a high-speed passenger car due to aerodynamics inside tunnels
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- Diedrichs, Ben (author)
- KTH,Spårfordon,Bombardier Transportation,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Berg, Mats (author)
- KTH,Spårfordon,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Stichel, Sebastian (author)
- KTH,Spårfordon,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Chalmers University of Technology, Gothenburg, Sweden
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- Krajnovic, Sinisa, 1970 (author)
- Chalmers University of Technology, Gothenburg, Sweden,Chalmers tekniska högskola
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(creator_code:org_t)
- 2007
- 2007
- English.
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In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit. - 0954-4097 .- 2041-3017. ; 221:4, s. 527-545
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https://urn.kb.se/re...
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Abstract
Subject headings
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- High train speeds inside narrow double-track tunnels using light car bodies can reduce the ride comfort of trains as a consequence of the unsteadiness of the aerodynamics. This fact was substantiated in Japan with the introduction of the series 300 Shinkansen trains more than a decade ago, where the train speed is very high also in relatively narrow tunnels on the Sanyo line.The current work considers the resulting effects of vehicle dynamics and ride comfort with multi-body dynamics using a model of the end car of the German high-speed train ICE 2. The present efforts are different from traditional vehicle dynamic studies, where disturbances are introduced through the track only. Here disturbances are also applied to the car body, which conventional suspension systems are not designed to cope with.Vehicle dynamic implications of unsteady aerodynamic loads from a previous study are examined. These loads were obtained with large eddy simulations based on the geometry of the ICE 2 and Shinkansen 300 trains.A sensitivity study of some relevant vehicle parameters is carried out with frequency response analysis (FRA) and time domain simulations. A comparison of these two approaches shows that results which are obtained with the much swifter FRA technique are accurate also for sizable unsteady aerodynamic loads. FRA is, therefore, shown to be a useful tool to predict ride comfort in the current context.The car body mass is found to be a key parameter for car body vibrations, where loads are applied directly to the car body. For the current vehicle model, a mass reduction of the car body is predicted to be most momentous in the vicinity of 2 Hz.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Farkostteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Vehicle Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- train aerodynamics
- large eddy simulation
- tunnel aerodynamics
- vehicle dynamics
- tail vehicle oscillation
- flow-induced vibrations
- ride comfort
- Vehicle engineering
- Farkostteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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