... Abstract Theoretically, the vortex–induced vibration, caused by the trailing vortex shedding in flows around the blunt body, is probably major reason for structural fatigue damage. An effective way in engineering is to attach a thin plate in the wake of the blunt rigid body, that can reduce...

... in shape with the suppression of the vortex shedding. At the same time, inclination makes the cross-sectional area of the pile to become elliptical, leading to an increase in the friction area and turbulence production on the cylinder boundary layer. Also, the upstream separation distance of the cylinder...

...-element method. vector flexible riser anchor line internal fluid upstream oil & gas equation modeling riser virtual rod spectrain artificial intelligence international offshore computer program grigoryeva ij 1 interaction rainflow durability node vortex shedding calculation...

... ABSTRACT: The vortex shedding characteristics for submarine pipelines in a subcritical regime are quantitatively investigated. The swirling strength analysis is conducted on the wake flows around the pipelines. For a single wall-free pipeline, the peak value of the time-averaged nondimensional...

...-shaped floating body. Obtained results were expected to agree with computed ones by a 2-D BEM based on the potential-flow theory. However the result was not the case, and a large discrepancy was observed. Viscous effects associated with vortex shedding from a sharp corner of the model are one reason...

... for Wind-Induced Vortex Shedding Vibrations Kurt Sjursen Kva~rner Oil & Gas a.s Oslo, Norway ABSTRACT The presented design criteria, which have been used successfully for nine flare booms installed since 1990, provide a simple method for avoiding vortex shedding induced vibrations in tubular structures...

...-Induced Moments on Vortex Shedding of Deep Water Pipelines B.s. ChOl and R.D. Haun OPI InternatlOnal Inc. Houston, Texas, USA ABSTRACT Tensioned beam theory is used to calculate displacements and moments of free spanned portions of offshore pipelines. The Rayleigh method IS Implemented to calculate...

... cylinder by mains of the bi- laser sheet illuminating method Finally a theoretical model was proposed based on 3-D N-S equation in cylindrical coordinate frame. The model successfully interpreted the cell pattern of vortex shedding and expected the relationship between cell length and Reynolds number...

... cylinders that are suceptible to direct vortex induced vibrations, while the structures under consideration are offshore flare booms, i.e. welded latticed structures. The results suggests that the design rules are too conservative for vortex shedding on these type of structures, and also do not con- sider...

... ABSTRACT This paper presents a numerical method to solve a free-surface flow interacted by the vortex-shedding phenomena in a two dimensional shallow channel. The numerical model based on the stream function and vorticity formulation analyzes the viscous free-surface flow past a submerged...

... accurately. The reason why the drag term does not predict high frequency components is because the effect of vortex shedding is not taken into account. During the first half-cycle of flow oscillation starting from rest, simple theory suggests that u|u| is roughly proportional to the rate at which vorticity...