Název:
Experimental and numerical verification of vortex-induced vibration of hangers on the footbridge
Autoři:
Urushadze, Shota ; Pirner, Miroš ; Pospíšil, Stanislav ; Král, Radomil Typ dokumentu: Příspěvky z konference Konference/Akce: Engineering mechanics 2012 - International conference /18./, Svratka (CZ), 2012-05-14 / 2012-05-17
Rok:
2012
Jazyk:
eng
Abstrakt: The paper deals with vortex-induced oscillations of footbridge hangers at a very low wind speed. The two-spans (2x50m) reinforced concrete structure with the central pylon (25m height) is designed as the harp system of hangers with circular cross-section. The oscillations were observed at the low wind speed and the high double amplitudes has been measured. The wind-excited deformation shape corresponded to the 6th, 7th and 8th natural modes of a hanger. The individual hanger as well as thein group were analysed to estimate the dynamic response, possible aeroelastic vibration and special interference or coupling effects. It also includes proposal for the elimination of the extensive vibration. The analysis is complemented by numerical investigation using Computational Fluid Dynamics methods.
Klíčová slova:
fluid dynamics; footbridge; Kármán vortex; vortex-induced oscillations Číslo projektu: GA103/09/0094 (CEP), GAP105/10/2159 (CEP), FR-TI3/654 (CEP) Poskytovatel projektu: GA ČR, GA ČR, GA MPO Zdrojový dokument: Engineering Mechanics 2012, ISBN 978-80-86246-39-0
Instituce: Ústav teoretické a aplikované mechaniky AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0213769