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Parametric flutter analysis of bridges stabilized with eccentric wings
Citation Link: https://doi.org/10.15480/882.3425
Publikationstyp
Journal Article
Date Issued
2021-03-25
Sprache
English
Author(s)
Starossek, Uwe
Institut
TORE-DOI
TORE-URI
Volume
211
Article Number
104566
Citation
Journal of Wind Engineering and Industrial Aerodynamics 211: 104566 (2021-04-01)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
The eccentric-wing flutter stabilizer is a passive aerodynamic device for raising the flutter speed of a bridge. It consists of wings running parallel to the bridge deck. In contrast to similar devices proposed in the past, the wings do not move relative to the bridge deck and they are positioned outboard the bridge deck to achieve a greater lateral eccentricity. This enables the wings to produce enough aerodynamic damping to effectively raise the flutter speed. A comprehensive parametric flutter analysis study is presented in which both the properties of the bridge and the configuration of the wings are varied. The bridge properties and the wing configuration are each summarized in four non-dimensional quantities. The parameter space within which these numbers are varied are determined on the basis of previous work and the structural properties of actual long-span bridges. As for the wind forces, a streamlined bridge deck contour is assumed. The main interest of this study is the relative flutter speed increase due to the wings. This and other non-dimensional results are presented in diagrams and discussed. Both multi-degree-of-freedom and generalized two-degree-of-freedom flutter analyses are performed. Torsional divergence is addressed. A strategy for choosing a cost-efficient wing configuration is suggested.
Subjects
Aerodynamic damping device
Aeroelastic instability
Design strategy
Finite element flutter analysis
Fixed wing
Parameter study
Passive vibration control
DDC Class
620: Ingenieurwissenschaften
690: Hausbau, Bauhandwerk
Publication version
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