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" Computational Fluid Dynamics Simulation of Rain-Wind-Induced Vibration of Stay Cables "
Wang, Hongfan
Agrawal, Anil Kumar
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Latin Dissertation
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English
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| Record Number
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1113602
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TLpq2359411453
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| Main Entry
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Agrawal, Anil Kumar
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Wang, Hongfan
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| Title & Author
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Computational Fluid Dynamics Simulation of Rain-Wind-Induced Vibration of Stay Cables\ Wang, HongfanAgrawal, Anil Kumar
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| College
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The City College of New York
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| Date
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2020
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2020
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| Degree
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Ph.D.
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| Page No
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307
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| Abstract
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Due to the large amplitude, frequent occurrence and severe consequences, the rain-wind induced vibration (RWIV) of stay cables in cable-stayed bridges has been investigated extensively by researchers around the world. However, the underlying excitation mechanism is still unclear. Recently, computational fluid dynamics (CFD) simulation has been widely applied in the research on structure vibrations due to dynamic wind loads, with great potential as an alternative tool for wind tunnel testing. It has also been adopted to investigate the RWIV, but only a few studies have been conducted so far. Furthermore, most of the CFD simulations reported in literatures are two-dimensional, and a circular cylinder has been widely adopted to represent the stay cables. Thus, only the wind flow normal to the stay cable axis has been taken into account. Such simplifications may be inappropriate, since some key factors are completely ignored, such as the wind flow parallel to the stay cable axis, the spatial orientation of stay cable, etc. Therefore, the CFD method has also been chosen in this dissertation, but with a new modeling approach-using a two-dimensional skewed elliptical cylinder to represent an inclined stay cable. Extensive simulations have been conducted for this case to investigate the role of the upper rivulet in the RWIV, by examining the related aerodynamic forces acting on the cable models. Two key parameters- airflow speed and the rivulet location have been focused on.
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Cable vibration
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Cable-stayed bridge
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CFD simulation
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Civil engineering
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Rain-wind-induced vibration
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