... (VIV) often represent a safety risk and a major design consideration adding notable costs to all stages of the system development. It is known that the presence of waves may disrupt organized vortex shedding and affect structures’ dynamic responses and resulting drag loads. However, the present...

... Abstract The slender marine structure (e.g., deep water riser systems) subjected to vortex induced vibrations (VIV) can oscillate simultaneously in both cross-flow (CF) and in-line (IL) direction relative to the flow direction. The IL response is important as it may contribute to fatigue damage...

... Abstract This study examines the influence of buoyancy elements on the VIV responses of a flexible riser using a combined method involving the non-linear time domain VIV prediction program VIVANA-TD and Computational Fluid Dynamics (CFD). Detailed analysis of the flow physics around buoyancy...

... Abstract In this paper, the impact of buoyancy modules aspect ratios and arrangement on the VIV response of a power cable or riser is addressed through a dual approach coupling experimental and numerical simulations. Two sets of experiments are performed in the ‘South France – Ocean Basin...

... Abstract Vortex Induced Vibrations (VIV) are one of the major design concerns for deep-water riser systems. Large uncertainties and limitations in the existing prediction tools and design practice lead to not only costly riser designs, but also have a negative impact on the floaters...

... to VIV induced fatigue damage: A lazy-wave power cable attached to the seabed, and a W-Shaped cable directly connected between two FOWTs. The model is used to compare the lazy-wave and W-shape power cable configurations; identifying the propensity of each to experience direct, heave or surge/sway induced...

... Abstract Vortex induced vibrations (VIV) may be developed in the sag-bend area of steel catenary risers (SCRs) and lazy wave risers (SLWRs) induced by the top motions. There is lack of reliable tools to predict VIV responses in such oscillatory flow conditions in the riser design. A time-domain...

... Abstract A data-driven hydrodynamic force model is developed to model the dynamic forces on an oscillating circular cylinder for flow conditions where Vortex-Induced-Vibrations (VIV) are known to occur. The model is developed for use in future control systems to improve VIV-based energy...

... conservative or plainly wrong. This paper reviews some key aspects of the DNVGL-RP-F105 fatigue model and explore their implication to fatigue design and assessment. And it hopes to clarify why your free span has not failed even when you expected it to. free span VIV DNVGL-RP-F105 Proceedings...

... verification includes riser sizing, adjacent riser interference, cathodic protection, dynamic strength analysis, Vortex-Induced Vibration (VIV) analysis, wave motion fatigue analysis, semi-submersible Vortex-Induced Motion (VIM) fatigue analysis, and riser installation. Sensitivity study was carried out...

... Abstract Vortex-induced vibration (VIV) is one of the most critical issues in deepwater developments due to its resultant fatigue damage to subsea structures such as risers, pipelines and jumpers. Although VIV effects on slender bodies have been comprehensively studied over decades, very few...

... Abstract This paper presents the experimental investigation of vortex-induced vibrations (VIV) of a flexibly mounted circular cylinder in combined current and wave flows. The same experimental setup has previously been used in our previous study (OMAE2020-18161) on VIV in regular waves...

... intermediate supports to suppress VIV, since the latter proved not to be a long-term solution, (2) using partial rather than full strake coverage of spans and developing tools to quantify the level of strake coverage that is required, (3) improving estimates of soil stiffness and damping, and tools to handle...

... Abstract Risers are an integral part of an offshore oil and gas exploration structures, and that they are prone to vortex-induced vibration (VIV). Although several studies are conducted to analyze the VIV characteristics of risers, the results of amalgamation of multiple parameters and also...

... Abstract An empirical time-domain (TD) vortex-induced vibration (VIV) prediction model has been implemented in a software called VIVANA-TD based on its earlier development by Thorsen at NTNU. It models the synchronization of VIV loads and structural responses with a set of empirical parameters...

... Abstract Recognizing the need to address the challenges associated with the VIV assessment of rigid jumpers, a joint industry project (JIP) was launched in December 2014. The JIP was based on the model test data supplied by ExxonMobil. Through the JIP study, measured responses from tow tests...

... of 30 years and beyond. The fatigue assessment of the SCRs considers the damage contributions from the semi wave motions, riser Vortex-Induced Vibration (VIV) due to ambient current, and Vortex-Induced Motion (VIM) of a semi-submersible platform. Fatigue contribution from installation is also considered...

...), the in-line VIV response of partially strake-covered pipeline spans is calculated. It is found that as little as 10% strake coverage at the optimal location effectively suppresses pure in-line VIV. Further advantages of strakes rather than intermediate supports to suppress in-line VIV include: strakes...

... Abstract In deep sea oil exploitation, offshore platforms will move periodically in the water under the combined effects of waves, currents and winds. The relatively oscillatory flow is generated between the riser connected to the platform and the water. Vortex-induced Vibration (VIV) features...

... simulation to get the vibration law of the corresponding feature points and compare it with the experimental results. The results indicate that the numerical analysis reasonably match with experimental results. flexible catenary risers mid-line buoyancy system VIV comparative experiment Study...