Investigations of Strouhal numbers of iced cable models of cable-supported
bridges with respect to angle of wind attack
cytuj
pobierz pliki
RIS BIB ENDNOTEWybierz format
RIS BIB ENDNOTE
Investigations of Strouhal numbers of iced cable models of cable-supported
bridges with respect to angle of wind attack
Data publikacji: 11.12.2015
Czasopismo Techniczne, 2015, Budownictwo Zeszyt 2-B (12) 2015, s. 417 - 432
https://doi.org/10.4467/2353737XCT.15.147.4184Autorzy
Investigations of Strouhal numbers of iced cable models of cable-supported
bridges with respect to angle of wind attack
The influence of the ice accretion, angle of attack and Reynolds number on the flow field around iced cables of cablesupported bridges is not clearly understood. The Strouhal number is one of the most important parameters which is necessary for an analysis of the vortex excitation response of slender structures. This paper presents the method and results of wind tunnel investigations of the Strouhal number of stationary iced cable models of cable-supported bridges. The investigations were conducted in a climatic wind tunnel laboratory of the Czech Academy of Sciences in Telč. The methodology leading to the experimental icing of the inclined cable model in the climatic section of the laboratory was prepared. The shape of the ice on the cable was registered by photogrammetry and numerical evaluation. For the aerodynamic investigations, the iced cable model in a smaller scale was reproduced using a 3D printing procedure. The Strouhal number was determined within the range of the Reynolds number between 2.4·104 and 16.4·104, based on the dominant vortex shedding frequency measured in the flow behind the model. The model was orientated at three principal angles of wind attack for each of the Reynolds number values. In order to recognize the tunnel blockage effect, the Strouhal number of a smooth circular cylinder was tested. Strong agreement with the generally reported value in the subcritical Reynolds number range for a circular cylinder was obtained.
[1] D emartino C., Koss H.H., Georgakis C.T., Ricciardelli F., Effects of ice accretion on the aerodynamics of bridge cables. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 138, 2015, 98-119.
[2] E urocode 1, Action on structures – part 1-4: General action – Wind action, 2009.
[3] Flaga A., Inżynieria wiatrowa. Arkady, Warszawa 2008.
[4] Flaga A., Mosty dla pieszych, WK Ł, Warszawa 2011.
[5] Flaga A., Michałowski T., Zagadnienia aerodynamiki cięgien w mostach podwieszonych, Inżynieria i Budownictwo, Vol. 6, 1997, 316-321.
[6] G jelstrup H., Georgakis C.T., A quasi-steady 3 degree-of-freedom model for the determination of the onset of bluff body galloping instability, Journal of Fluids and Structures, Vol. 27, 2011, 1021-1034.
[7] G jelstrup H., Georgakis C.T., Larsen A., An evaluation of iced bridge hanger vibrations through wind tunnel testing and quasi-steady theory, Wind and Structures, Vol. 15(5), 2012, 385-407.
[8] G urung C.B., Yamaguchi H., Yukino T., Identification of large amplitude wind-induced vibration of ice accreted transmission lines based on field observed data. Engineering Structures, Vol. 24, 2002, 179-188.
[9] H artog J.P.D., Transmission-line vibration due to sleet, Institute of Electrical Engineers, Vol. 51, 1932, 1074-1086.
[10] http://cet.arcchip.cz/wind-laboratory-en (online: 07.2014).
[11] http://www.toledoblade.com/gallery/Ice-closes-Skyway (online: 07.2014).
[12] K oss H., Gjelstrup H., Georgakis C.T., Experimental study of ice accretion on circular cylinders at moderate low temperatures, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 104-106, 2012, 540-546.
[13] Makkonen L., Modelling power line icing in freezing precipitation, Atmospheric Research, Vol. 46, 1998, 131-142.
[14] Z dero R., Turan O.F., The effect of surface strands, angle of attack, and ice accretion on the flow field around electrical power cables, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 98, 2010, 672-678.
[15] Z dravkovich M.M., Flow around circular cylinders, Volume 1: Fundamentals, Oxford University Press, US A, Oxford 1997.
[16] Z hitao Y., Zhengliang L., Eric S., William E.L., Galloping of a single iced conductor based on curved-beam theory, Journal of Wind Enginee
Informacje: Czasopismo Techniczne, 2015, s. 417 - 432
Typ artykułu: Oryginalny artykuł naukowy
Tytuły:
Investigations of Strouhal numbers of iced cable models of cable-supported
bridges with respect to angle of wind attack
Investigations of Strouhal numbers of iced cable models of cable-supported
bridges with respect to angle of wind attack
AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Department of Road and Bridges, Opole University of Technology, Poland
Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, Czech Republic
Climatic Wind Engineering Laboratory CET, ITAM , Czech Republic
Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, Czech Republic
Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia
Publikacja: 11.12.2015
Status artykułu: Otwarte
Licencja: Żadna
Udział procentowy autorów:
Korekty artykułu:
-Języki publikacji:
AngielskiLiczba wyświetleń: 1938
Liczba pobrań: 1260