Experiments and Modeling on the Maximum Displacement of a Long Tensioned Mooring Tether Subjected to Vortex-induced Vibration

The maximum root mean square (RMS) of the displacement of a long tensioned mooring tether undergoing vortex-induced vibration (VIV) as the flow velocity varies was experimentally investigated, and an evaluation model was established to predict the maximum RMS value of the displacement by a dimensionless analysis. The results showed that the maximum RMS of the displacement linearly increased with the increasing of the flow velocity if only the low order modes were excited at the corresponding flow velocities. This kind of maximum RMS of displacement was evaluated by the proposed model, which is more reliable when it was used to predict the maximum RMS of the total displacement.