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Experiment study of vortex-induced vibrations of a separated twin-box girder with large cantilever plate
Published in Airong Chen, Xin Ruan, Dan M. Frangopol, Life-Cycle Civil Engineering: Innovation, Theory and Practice, 2021
F.K. Li, X.H. Hu, R.J. Ma, Q.F. He
Vortex-induced vibration (VIV) is a typical limited amplitude vibration caused by periodically vortex shedding on the surface of bridge decks. Although it can’t destroy bridges like flutter, VIV may occur at low wind speed frequently, affect fatigue strength of bridge and impair the driving safety of vehicles. VIV was observed in many long-span bridges, such as the Xihoumen Bridge in China (Li et al. 2011), the Great Belt Bridge in Denmark (Larsen et al. 2000) and the Second Severn Crossing in the UK (Macdonald et al. 2002).
Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
Published in Ships and Offshore Structures, 2019
Mohd Asamudin A Rahman, Wan Norazam Wan Hussin, Mohd Hairil Mohd, Fatimah Noor Harun, Lee Kee Quen, Jeom Kee Paik
Vortex-Induced Vibration (VIV) appears to be a significant consideration in designing moorings, risers, and offshore platforms. Recently, topics pertaining to VIV phenomena have been extensively reviewed, wherein a substantial number of successful approaches in VIV prediction have been adopted (see Khalak and Williamson 1999; Govardhan and Williamson 2000; Sarpkaya 2004; Sarpkaya 2004; Stappenbelt and O’ Neill 2007; Srinil and Zanganeh 2012; Gonçalves et al. 2013). As for structures built offshore, a number of factors need to be weighed in that may significantly affect costs of operation and maintenance. Various types of offshore structures may experience VIV and Vortex-induced Motion (VIM). Hence, this study focused on a circular cylindrical structure with low aspect ratio, particularly the SPAR platform, to arrive at a formula for VIM estimation. Analyses on the structural responses of this particular structure are indeed crucial, where structural reliability and serviceability are among the significant factors that need to be taken into account for analyses purpose. This has been portrayed in several recent investigations concerning VIM phenomenon on offshore structures (see Rahman and Thiagarajan 2015; Rahman et al. 2016; Cagney and Balabani 2016; Hirabayashi 2016; Thorsen et al. 2016; Gonçalves et al. 2018).
A higher-order nonlinear oscillator model for coupled cross-flow and in-line VIV of a circular cylinder
Published in Ships and Offshore Structures, 2018
Zhuang Kang, Cheng Zhang, Rui Chang
Vortex-induced vibration (VIV) exists widely in many engineering fields, such as the risers in offshore oil and gas exploration, bridges, cables, antennas, etc. (Wanderley and Soares 2015). When the fluid with a certain velocity runs through the cylindrical structures, the phenomenon of periodic vortex shedding will occur. The continuous generation and shedding of the vortex will produce the fluctuating lift and drag, which will lead to the cross-flow and in-line VIV of the structures (Rahman et al. 2016; Gao et al. 2017). And the VIV is one of the important reasons for structural fatigue damage.