Počet záznamů: 1
A wind tunnel analysis of flutter vibrations of a U-beam
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SYSNO ASEP 0429315 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název A wind tunnel analysis of flutter vibrations of a U-beam Tvůrce(i) Strecha, J. (AT)
Kuznetsov, Sergeii (UTAM-F) RID, SAI
Král, Radomil (UTAM-F) RID, SAI
Pospíšil, Stanislav (UTAM-F) RID, SAI, ORCID
Spitzy, L. (AT)
Steinrück, H. (AT)Celkový počet autorů 6 Zdroj.dok. Proceedings of the 9th International Conference on Structural Dynamics. EURODYN 2014. - Porto : European Association for Structural Dynamics (EASD), 2014 / Cunha A. ; Caetano E. ; Ribeiro P. ; Müller G. - ISSN 2311-9020 - ISBN 978-972-752-165-4 Rozsah stran s. 3113-3120 Poč.str. 8 s. Forma vydání Nosič - C Akce International Conference on Structural Dynamics. EURODYN 2014 /9./ Datum konání 30.06.2014-02.07.2014 Místo konání Porto Země PT - Portugalsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. PT - Portugalsko Klíč. slova fluid structure interaction ; bridge deck aerodynamics ; vortex induced vibrations ; self excited vibration Vědní obor RIV JM - Inženýrské stavitelství CEP ED1.1.00/02.0060 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GC13-34405J GA ČR - Grantová agentura ČR Institucionální podpora UTAM-F - RVO:68378297 UT WOS 000354786604020 EID SCOPUS 84994422989 Anotace Motivated by assessing the aeroelastic stability of a conveyor solution, the aeroelastic stability of a U-beam with an aspect ratio (width B over frontal height H) of B/H = 4.62 is investigated. Wind-tunnel experiments involving a special test stand for sectional models and complementary CFD simulations were carried out. We find that the U-beam can perform self-excited two-degree of freedom (flutter) vibrations. This is also reflected in the simulation results. Vortex-induced vibrations were observed experimentally, but the amplitudes were small in respect to the frontal height. Numerically, it was found that there exist two different patterns of the flow around the U-profile: One pattern that is very similar to the flow around a rectangular prism ( “R-flow” pattern) and another pattern were the flow “reaches” into the pocket of the profile (“U-flow” pattern). The amplitude of vortex induced vibrations depends strongly on the flow pattern. When the R-flow pattern is realized, the amplitudes were again small and of the same order of magnitude as in the experiments. When the U-flow pattern is realized, much greater vibration amplitudes were observed in the simulations. Up to now, this could not be observed in the wind tunnel experiments. However, for self-excited vibrations at higher reduced velocities it appears that the U-flow pattern cannot be sustained: After an initial phase the flow pattern changes to the R-flow pattern. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2015 Elektronická adresa http://paginas.fe.up.pt/~eurodyn2014/CD/papers/435_MS20_ABS_1318.pdf
Počet záznamů: 1