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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00460462" target="_blank" >RIV/68378297:_____/16:00460462 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/16:00302214

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 Vr 2 h3:90 7:77i that corresponds to the resonance band of St 2 h0:14 0:25i. 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 Vr 2 h3:90 7:77i that corresponds to the resonance band of St 2 h0:14 0:25i. 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.

Druh

O - Ostatní výsledky

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů