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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 102
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by:
Paper 26

Analysis of Aerodynamic Impact induced by High Speed Trains

H. Friedl1, M. Reiterer2 and H. Kari3

1Austrian Institute of Technology, Vienna, Austria
2RED Bernard GmbH, Vienna, Austria
3ÖBB Infrastruktur AG, Vienna, Austria

Full Bibliographic Reference for this paper
H. Friedl, M. Reiterer, H. Kari, "Analysis of Aerodynamic Impact induced by High Speed Trains", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 26, 2013. doi:10.4203/ccp.102.26
Keywords: aerodynamic pressures, noise barriers, high speed trains.

Summary
Structures such as noise-barrier walls along high-speed railway lines are subject to aerodynamic excitations caused by alternating overpressure and underpressure loads induced by passing trains. This paper presents the results from holistic investigations during in-situ measurements at a new train high speed track in Austria. Trains moving quickly create an aerodynamic bow wave, comprised of a rapid alternation of overpressures and underpressures, as well as an aerodynamic stern wave, comprised of a rapid alternation of underpressures and overpressures. The amplitude of these waves depends on various factors, including the shape of the front and the back of the train and its velocity. A passing train thus causes cycles of overpressure and underpressure to act on any structures near the track, such as noise-barrier walls. The intensity of the load also depends on various factors, including the distance of the wall from the track. These effects cause cyclical stresses at a frequency of several per second. Due to the significant influence of the trains aerodynamic shape, in-situ measurements for the determination of the aerodynamic impact of different train types were carried out. The test bed area was located between Vienna and St. Pölten, maximum speed drives were operated by ICE trains with a measured train velocity of 336km/h. In this paper the functional correlation between the dynamic excitation and the dynamic characteristics of noise barrier walls are discussed.

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