The prediction and control of vortex-induced vibration (VIV) is one the key problems for riser design. effect platform heave motion on VIV deep sea top-tensioned (TTR) presented by means numerical simulation experiment in this research. First, was modeled as a parametric excitation, governing equation considering excitation established. Then, dynamic response TTR calculated numerically finite d...

Vortex-induced vibration (VIV) of a long riser in sheared current is often considered as an energy balance problem: Excitation forces in the power-in region add an equal amount of energy to the system as is dissipated by damping forces outside this region and structural damping. A riser may have different excitation and damping regions depending on the actual oscillation frequency, cross-sectio...

Submitted for the DFD15 Meeting of The American Physical Society Generalized “thick” strip modelling for vortex-induced vibration of long flexible cylinders1 YAN BAO, RAFAEL PALOCIOS, SPENCER SHERWIN, Imperial College London, NEKTAR++ COLLABORATION — We propose a generalized strip modelling method that is computationally efficient for the VIV prediction of long flexible cylinders in three-dimen...

Reaction of [(Me3tacn)V(CF3SO3)3] (Me3tacn = N,N',N''-trimethyl-1,4,7-triazacyclononane) with LiCN in DMF results in oligomerization of cyanide to form [(Me3tacn)2V2(CN)4(mu-C4N4)]. The structure of this binuclear complex features a planar tetracyanide unit bridging two VIV centers via imido type linkages. The conjugated pathway provided by the bridging ligand leads to strong antiferromagnetic ...

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The strip theory in hydrodynamics has been widely used for predicting complex vortex induced vibrations (VIV) behind bluff bodies, but the question of how accurate such predictions are not addressed adequately before. In order to corroborate application VIV, we present a comparative study between free mono-frequency long flexible cylinder both uniform and linearly sheared flow corresponding for...

Centrally slotted box decks have been commonly used as components of bridges, especially for long-span bridges. A wind tunnel experiment was conducted to investigate the effect attachments on vortex-induced vibration (VIV) deck. In this research, characteristics VIV responses at different attack angles 5 models considering naked bridge decks, crash barriers, and vehicles bridges were studied di...