Naslov
Influence of wind angle of attack and isotropic turbulence on wind-induced vibrations of ice- accreted bridge cables

Autori
Pospíšil, Stanislav ; Trush, Arsenii ; Kuznetsov, Sergey ; Kozmar, Hrvoje ; Náprstek, Jiří

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 8th International Colloquium on Bluff Body Aerodynamics and Applications / - Boston (MA), 2016

Skup
8th International Colloquium on Bluff Body Aerodynamics and Applications

Mjesto i datum
Boston (MA), Sjedinjene Američke Države, 07.06.2016. - 11.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bridge cables; ice accretion; atmospheric turbulence; dynamic response; wind-tunnel experiments

Sažetak
Bridge-supporting cables and mast guys with high flexibility and low damping often experience vibrations with large amplitudes that may have consequently destructive effects on supported structures. Surface roughness and ice accretion are important issues, as they can considerably alter aerodynamic characteristics of bridge cables. This study describes wind- tunnel experiments on vortex-induced vibration of cylindrical section models with the deliberately adjusted natural frequency f = 5 Hz. The range of reduced velocity was V<r> between 3.90 and 7.77, that corresponds to the resonance band of St between 0.14 and 0.25. Three different cable models were used, i.e., smooth cylinder representing dry cable, helical strand cable and cable with ice-accretion. The isotropic turbulent flow was modelled to represent the low turbulent and moderately turbulent wind conditions.

Izvorni jezik
Engleski

Znanstvena područja
Matematika, Fizika, Strojarstvo

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