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Influence of the Reynolds-Number on Flow Induced Vibrations of Generic Bridge Sections

Schewe, Günter (2006) Influence of the Reynolds-Number on Flow Induced Vibrations of Generic Bridge Sections. In: Proceedings of the International Conference on Bridges, pp. 351-358. SECON HDGK. International Conference on Bridges, 2006-05-21 - 2006-05-24, Dubrovnik, Croatia (Europe). ISBN 953-95428-0-4.

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Bridge structures are often composed of more or less bluff bodies. A main point of the lecture is the question: In which case does the Re. No. play a significant role, in particular concerning their influence on the propensity to flow induced vibrations. The paper reviews the results of experiments carried out over a wide range of Reynolds numbers in a high pressure windtunnel. The two dimensional bodies investigated are: a generic Tacoma section, a sharp-edged, trapezoidal-shaped bridge section (approach span of “Great Belt” bridge) and a rectangular section with aspect ratio 1:5. Concerning the aeroelastic behaviour of the simplified Tacoma section, response curves will be presented, showing the occurrence of nonlinear vortex resonance phenomena. In case of the Belt section, variation of Re No led to significant changes in the force coefficients and St. No., caused by changes in the topological structure of the separated flow. For an angle of incidence α = 4° the rectangular cylinder shows strong Re No effects in particular in the curve of the lift coefficient. Generally one can say, bluff bodies having sharp-edged sections may suffer pronounced Reynolds-number effects as well.

Item URL in elib:https://elib.dlr.de/44294/
Document Type:Conference or Workshop Item (Speech)
Title:Influence of the Reynolds-Number on Flow Induced Vibrations of Generic Bridge Sections
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schewe, GünterInstitut für AeroelastikUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Proceedings of the International Conference on Bridges
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 351-358
EditorsEmailEditor's ORCID iDORCID Put Code
Publisher:SECON HDGK
Series Name:International Conference Proceedings
Keywords:bridge aerodynamics, bridge flutter, bridge section, Reynolds number, Strouhal number, Belt section, rectangular section, vibrations
Event Title:International Conference on Bridges
Event Location:Dubrovnik, Croatia (Europe)
Event Type:international Conference
Event Dates:2006-05-21 - 2006-05-24
Organizer:Structural Engineering Conference (SECON) and Croatian Society of Structural Engineers (CSSE)
HGF - Research field:other
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:02 Aug 2006
Last Modified:27 Apr 2009 13:00

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