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Numerical modeling of vortex induced motions appears to be one of primary objectives of offshore constructions design. The flow around structure elements with certain elongated geometry shape as pipes, risers, mooring lines, oil rig legs etc., causes vortex induction, which in turn could lead to negative side effects such as cross motion or even to structural damage. The vibration process modeling in advance could allow the structures design and production without extra margins of safety and therefore the final pr...