Vortex-induced vibration (VIV) is the main cause of marine risers’ fatigue damage. It is very hard to predict VIV of marine risers due to the nonlinearity and instability of the flow. By taking the flexible structural deforming into account, the fluid-structure interaction problem becomes more complex.. Vortex-induced vibrations (VIV) is a nonlinear flow-structure interaction phenomenon found in various civil, ocean, subsea, mechanical and aerospace engineering applications where the vortex-shedding hydrodynamic forces excite and interact with flexible structures. VIV is governed by several fluid-structure parameters entailing a variety of.
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The fluctuating lift and drag forces may cause structural vibrations, which give rise to a complex fluid structure interaction referred to as Vortex Induced Vibrations (VIV). When the wake vortex shedding, frequency is close to the structure fundamental frequency, the VIV amplitude can become relatively large.. Vortex-induced vibration (VIV) is an important source of fatigue damage of offshore oil exploration drilling, export, production risers, including steel catenary risers (SCRs) and tension leg platform (TLP) tendons or tethers. These slender structures experience both current flow and top-end vessel motions, which both give rise to the flow.