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A Simplified Model of the Wave Generation Due to Train-Tunnel Entry

Wagner, Sebastian and Ehrenfried, Klaus and Dillmann, Andreas (2015) A Simplified Model of the Wave Generation Due to Train-Tunnel Entry. In: The Aerodynamics of Heavy Vehicles III: Trucks, Buses and Trains Lecture Notes in Applied and Computational Mechanics, 79 (1). Springer International Publishing. pp. 161-173. doi: 10.1007/978-3-319-20122-1_10. ISBN 978-3-319-20121-4. ISSN 1613-7736.

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Official URL: http://www.springer.com/us/book/9783319201214


The compression wave generated when a high-speed train cnters a tunnel at Mach numbers smaller than 0.4 can be described in good approximation by a linear theory of an inviscid fluid. The wave equation for the acoustic potential becomes the governing equation. lt is solved by a three dimensional boundary elcment method in time domain which forces a vanishing normal component of the velocity at the tunnel wall. lt is assumed that the elements arc compact in time. This leads to a linear equation in which a special matrix-vector multiplication has to be evaluatcd for every time-step. The aim is to crcate a fast method which sets as few constraints on the geometry as possible but nevertheless gives an accurate description of the wave propagation. ln a first stcp the elements are assumed to bc rectangles and an infinitely thin cylindric tube of finite length is taken as the geometry of the tunnel. The train is modeled by a single moving mass source of monopole type. lt defines a semi-infinitc body whose shape slightly changes when entcring the tunnel. The results of this simple model along with the comparison with analytical solutions and experimental data are shown and discussed.

Item URL in elib:https://elib.dlr.de/98906/
Document Type:Contribution to a Collection
Additional Information:Proceedings of "The Aerodynamics of Heavy Vehicles III: Trucks, Buses and Trains", held September, 2010 in Potsdam, Germany, eBook ISBN: 978-3-319-20122-1
Title:A Simplified Model of the Wave Generation Due to Train-Tunnel Entry
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:The Aerodynamics of Heavy Vehicles III: Trucks, Buses and Trains
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 161-173
EditorsEmailEditor's ORCID iDORCID Put Code
Orellano, AlexanderBombardier TransportationUNSPECIFIEDUNSPECIFIED
Publisher:Springer International Publishing
Series Name:Lecture Notes in Applied and Computational Mechanics
Keywords:Train-Tunnel Entry, Compression wave
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Institute of Aerodynamics and Flow Technology > Leitungsbereich AS GO
Deposited By: Micknaus, Ilka
Deposited On:23 Nov 2015 15:18
Last Modified:10 May 2016 23:33

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