Reference : Wind tunnel investigation of the stall flutter oscillations of a bridge deck
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
http://hdl.handle.net/2268/24452
Wind tunnel investigation of the stall flutter oscillations of a bridge deck
English
Andrianne, Thomas mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique >]
Dimitriadis, Grigorios mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale >]
May-2009
Proceedings of the 8th National Congress on Theoretical and Applied Mechanics
90-97
No
No
National
8th National Congress on Theoretical and Applied Mechanics
du 28 mai au 29 mai 2009
National Committee for Theoretical and Applied Mechanics
Brussels
Belgium
[en] Nonlinear Aeroelasticty ; Stall flutter ; Bridge
[en] Torsional Stall Flutter (TSF) is a one degree of
freedom, self-excited phenomenon induced by the periodic
separation/re-attachment of the flow around a body. The
present paper proposes an experimental investigation of TSF
on a bridge deck. A section model free to oscillate in torsion
is tested in a low-speed wind tunnel. Static and dynamic tests
are performed to enable a complete interpretation of the
phenomena involved. For low airspeeds, the Karman vortex
shedding excites the structure, resulting in small oscillations
at the vortex shedding frequency. For high airspeeds, the
deck undergoes Limit Cycle Oscillations (LCO) due to the
TSF phenomenon. Nevertheless the Karman vortex
shedding excitation is still present and appears in the
measured forces signals. Peaks and troughs in the lift
coefficient are detected for each pitching period. They are
interpreted as the separation/re-attachment of the flow
around the deck. The large amplitudes motion of the deck
undergoing TSF reduces the amplitude of the aerodynamic
lift coefficient.
Researchers ; Professionals
http://hdl.handle.net/2268/24452
http://www.nctam.org/

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