... Vortex-Induced Vibration (VIV) in flexible structures, focussing on a vertical cylinder. IMUs were strategically placed along a silicone hose filled with steel microspheres, corresponding to the reduced-scale model of a flexible riser. The tests carried out in a water channel at UFSC involved IMU data...

... of Technology Guangzhou, China ABSTRACT The power cable extending from the offshore wind turbine foundation is an important component of offshore wind field. The phenomenon of periodic vortex shedding during the flow passing offshore wind power cable promotes the vortex-induced vibration (VIV), possibly causing...

... response of the faired cylinder under different inflow angles is quite distinct. INTRODUCTION Slender flexible structures, such as risers, pipelines, and cables, are widely used in ocean engineering. Vortex-induced vibration(VIV) has been confirmed as a significant factor of fatigue damage...

... ABSTRACT Prediction of vortex-induced vibration (VIV) in fluid dynamics has been challenging due to its strong nonlinearity. Nonlinear resonance and non-linear dissipation occur during VIV, which makes the response data collected highly nonlinear. The response of VIV is influenced by the flow...

... ABSTRACT Vortex-induced vibration (VIV) is prone to be induced along marine pipelines under the influence of ocean currents, leading to fatigue damage. In this paper, a comparative study of the VIV response in relation to airfoil, textured and smooth pipes is carried out using the CFD method...

... (VIV) vortex shedding mode, and the number of vortices released per cycle is much greater (at most twelve). INTRODUCTION Numerous studies have been dedicated to understanding Flow–induced oscillation (FIO), as a typical problem of fluid–structure interaction (FIS), because it is crucial in a wide...

... Abstract Vortex–Induced Vibration (VIV) is an important problem that can be seen in offshore structures such as drilling riser. VIV occurred due to synchronization (lock–in) of the vortex shedding and natural frequency of the structure. The lock–in phenomenon is normally observed...

... accurate screening tool for allowable free span lengths and fatigue from Vortex Induced Vibrations (VIV). A formula is developed to directly calculate the fatigue life in a pipe span under different boundary conditions. Both maximum and minimum span lengths are identified. Results are checked by FE modal...

... perpendicular to the incoming flow. The Reynolds number 3 × 10 3 ≤ Re ≤ 1.5 × 10 4 falls in the flow regimes TrSL2 and reduced-velocity range is 3 ≤ U* ≤ 15. It is found that the FSI solver can well capture the vortex-induced vibration (VIV) response of cylinder in this range of Reynolds number. The upper...

... ABSTRACT In the Arabian Gulf Region the design and construction of pipeline crossings poses a number of challenges due to the shallow water conditions. Typical examples are on-bottom hydrodynamic stability and Vortex Induced Vibration (VIV). For both of these design aspects...

... full beam element software that includes the axial stiffness. For the response under vortex shedding or VIV, industry software uses modal based methods, e.g. Shear7, these do not include any axial properties in the calculation, thus the potential for any axial stress and motion is missing. This paper...

... in the test. For the "from rest" case, the downstream cylinder exhibits three regimes of vibration responses: pure VIV, separated VIV and separated WIV, and combined VIV and WIV; For the "increasing velocity" case, it exhibits two regimes: separated VIV and separated WIV, and combined VIV and WIV. When...

... ABSTRACT The dynamic interaction between two parallel vibrating pipelines and local scour is investigated numerically in this research. A sediment scour model and the general moving objects (GMO) model are adopted to simulate the vortex-induced vibration (VIV) of pipeline and local scour...

... ABSTRACT Risers used for deep sea mining will be subjected to vortex-induced vibrations (VIV) caused by ocean currents. The internal flow, consisting of e.g. mineral ore and water, will have a non-uniform density. This traveling density wave may influence the dynamic response of the riser...

... ABSTRACT The research about response of a circular cylinder with fairings has been performed to control VIV previously, but not comprehensively. In the present study, the vibration of a circular cylinder with different fairings( θ =120°, 105 0 , 90 0 , 75 0 , 60 0 , 45 0 , θ is the character...

..., School of Naval Architecture, Ocean and Civil Engineering Shanghai Jiao Tong University, Shanghai, China ABSTRACT An investigation on three-dimensional (3-D) vortex-induced vibration (VIV) of a supported pipe conveying fluid with internal velocities in the subcritical regime is presented in this study...

... ABSTRACT The numerical simulations for actual size of a drilling riser, 0.5334m in diameter (D) and 800m in length (aspect ratio of 1500) with a top preload of 3000kN (1.5 times wet-mass) were carried out to address the VIV characteristics in this paper. The FSI simulations were implemented...

... ABSTRACT This paper proposes using modified pipe-in-pipe (PIP) system to mitigate vortex induced vibration (VIV). Numerical simulations are carried out to examine the effectiveness of the proposed method. Firstly, a semi-empirical oscillator model is developed and validated by an experimental...

..., U is the free-stream velocity, and μ is the dynamic viscosity coefficient. experimental measurement prediction regime vortex-induced vibration cylinder hydrodynamic force algorithm viv vortex-excited frequency response amplitude amplitude oscillation equation frequency...

...Numerical study for the effect of VIV on tendon of TLP Hyun-Sung Kim1,2, Byoung Wan Kim1,2, Seok Won Hong1,2 and Sa Young Hong1,2 1Korea Research Institute of Ships and Ocean Engineering Daejeon, Korea 2University of Science and Technology Daejeon, Korea ABSTRACT TLP (tension leg platform) is often...