Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Print: 2152-5102
ISSN Online: 2152-5110

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v29.i3-4.150
18 pages

Rain-Wind Induced Vibration of Stay Cables: Experimental Results and Numerical Interpretation

N. Cosentino
DISTART Department, University of Bologna Via Risorgimento 2,40136 Bologna, Italy
C. Ceccoli
DISTART Department, University of Bologna Via Risorgimento 2, 40136 Bologna, Italy
O. Flamand
Centre Scientifique et Technique du Batiment (CSTB), Nantes, France

ABSTRACT

The rain-wind induced vibration of stays is a phenomenon discovered recently and not well explained yet. As it is influenced by a wide range of physical parameters - wind speed, direction and turbulence, material water repellency, surface roughness, waterfall quantity, rain drop size and speed, cable size and shape, cable weight, pre-strain and also mechanical damping - this peculiar phenomenon is difficult to be reproduced in laboratory controlled condition. From a successful wind tunnel experimentation, in which physical data was measured, an extensive analysis was performed to identify the parameters of the rain-wind induced excitation. The unsteady pressure field and water thickness around the cable model were measured under rainy-excited conditions. The knowledge of those parameters provided helpful information about the air-flow around the cable and allowed to clarify the physical phenomenon which produces the excitation. Following this process a mechanical model of the exciting mechanism was elaborated and its parameters were calibrated by fitting the experimental results. The aim of this model is to help with comprehension of the phenomenon. In future it can be used to calculate the sensitivity of a cable structure to this dramatic excitation and also to assess the right level of countermeasure, necessary to avoid it.


Articles with similar content:

MOLECULAR DYNAMICS SIMULATION OF ULTRA-FAST THERMAL TRANSITION IN THIN FOIL IRRADIATED BY HIGH POWER ULTRA-SHORT LASER
ICHMT DIGITAL LIBRARY ONLINE, Vol.4, 2001, issue
Koichiro Ezato, Tomoaki Kunugi, Takehiko Yokomine, Eiji Hoashi, A. Shimizu
EXPERIMENTAL STUDY OF A THERMAL PLUME EVOLVING IN A FREE AND SEMI-CONFINED ENVIRONNEMENT: APPLICATION TO FIRES
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Rejeb Ben Maad, Taoufik Naffouti, Hatem Saafi
FACTORS INFLUENCING IGNITION AND EXPLOSION CHARACTERISTICS OF EXPLOSIVES UNDER DROP WEIGHT IMPACT
International Journal of Energetic Materials and Chemical Propulsion, Vol.12, 2013, issue 5
Shaoqiao Hu, Qi Zhang
TRANSIENT THERMAL MODELING OF A FOUR-STROKE INTERNAL COMBUSTION ENGINE EXHAUST VALVE
4th Thermal and Fluids Engineering Conference, Vol.34, 2019, issue
Mert Alpaya, Orcun Aslan, Iskender Kayabasi, Burag Hamparyan
INFLUENCE OF SURFACE WETTABILITY AND NANOSTRUCTURE ON THE GENERATION OF INTERFACIAL NANOBUBBLES
International Heat Transfer Conference 16, Vol.19, 2018, issue
Koji Takahashi, Yasuyuki Takata, Hideaki Teshima, Takashi Nishiyama