Aerodynamic wind tunnel testing of U-beams

0547580 - ÚTAM 2022 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Hračov, Stanislav - Macháček, Michael
Aerodynamic wind tunnel testing of U-beams.
Computational mechanics 2021. Proceedings of computational mechanics 2021. Plzeň: University of West Bohemia, 2021 - (Adámek, V.; Jonášová, A.; Plánička, S.; Zajíček, M.), s. 85-88. ISBN 978-80-261-1059-0.
[Computational Mechanics 2021 /36./. Srní (CZ), 08.11.2021-10.11.2021]
Grant CEP: GA ČR(CZ) GA19-21817S
Institucionální podpora: RVO:68378297
Klíčová slova: wind tunnel testing * aerodynamic coefficients * galloping
Obor OECD: Civil engineering
https://www.kme.zcu.cz/compmech/info_sborniky.php

The paper presents the outcomes from the experimental testing of the set of slender U-beams in the climatic wind tunnel. All analysed beams have identical basic geometry with the U-shaped cross section given by the side ratio equal to 2 (having the short side perpendicular to the flow), but they differ in the porosity of their flanges and in the depth of their profile. Two depths of the U-profile combined with six different levels of flange porosity are analysed. The U-beams were tested in the smooth flow in order to determine their aerodynamic coefficients for various angles of wind attack. The influences of the depth and porosity onto these coefficients are studied in detail. Moreover, the susceptibility of each individual case to transversal galloping is assessed based on the classical quasi-steady theory. The comparison with the results from the aerodynamic tests of the prisms with rectangular cross-sections having side rations equal to two, four and six is also given and discussed.
Trvalý link: http://hdl.handle.net/11104/0323843