Počet záznamů: 1
Experimental study of aeroelastic stability of hanger in rectangular array vibrating in the wake
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SYSNO ASEP 0519380 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV O - Ostatní Název Experimental study of aeroelastic stability of hanger in rectangular array vibrating in the wake Tvůrce(i) Hračov, Stanislav (UTAM-F) RID, SAI
Macháček, Michael (UTAM-F) ORCID, SAI, RID
Pospíšil, Stanislav (UTAM-F) RID, SAI, ORCIDCelkový počet autorů 3 Zdroj.dok. Proceedings of the 15th International conference on wind engineering. ICWE15. - Beijing : Beijing Jiaotong University, 2019 Poč.str. 10 s. Akce International conference on wind engineering. ICWE15 /15./ Datum konání 01.09.2019 - 06.09.2019 Místo konání Beijing Země CN - Čína Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CN - Čína Klíč. slova aeroelastic stability ; hanger ; wake interference ; interference galloping Vědní obor RIV JM - Inženýrské stavitelství Obor OECD Civil engineering CEP GA19-21817S GA ČR - Grantová agentura ČR GA19-04695S GA ČR - Grantová agentura ČR Institucionální podpora UTAM-F - RVO:68378297 Anotace The paper describes the analysis of the destructive oscillation of a skewed steel rod with the length 21 m. The steel rod is a part of roof supporting bundle (rectangular array) of cylindrical hangers at the airport building, it is therefore exposed to frequent moderate and sometimes strong winds with the low turbulence. The vibration is analyzed from the aeroelastic perspective, i.e. the cause of the oscillation is analyzed as wake-induced vibration because the collapse was observed at the bottom downwind hanger in that array configuration. The normalized distance of hangers in horizontal and vertical directions is equal to 3.15 D, and 3.8 D, respectively, where D is the diameter of the hanger cross section. Experimental testing of 1:1 scaled sectional model of four-cylinder array in the wind tunnel indicates, that the cause of the high level vibration is most probably the interference galloping. The instable behavior was detected both for the downwind hanger as a part of rectangular array and for the hanger as a part of a two hangers in a row only. The results indicate the strong influence of the top pair of the hangers on the decrease of the critical wind velocity, which is even below the value of the critical wind velocity obtained for two hangers only. The strong hysteresis effect resulting in the preservation of the high vibration amplitudes even after the decrease of wind speed far below the critical one, was observed. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2020
Počet záznamů: 1