This study investigates the implications of wave–current interaction on the dynamic responses of the W2Power
semisubmersible platform for floating offshore wind turbines under operational and extreme conditions. Firstly,
two analytical models based on Airy wave theory are developed to analyse the effects of current interaction
with ...
This study investigates the implications of wave–current interaction on the dynamic responses of the W2Power
semisubmersible platform for floating offshore wind turbines under operational and extreme conditions. Firstly,
two analytical models based on Airy wave theory are developed to analyse the effects of current interaction
with regular and irregular waves. Then, these models are integrated with the well-known engineering tool
OrcaFlex for the coupled aero-hydro-servo-elastic analysis. The presence of current was found to significantly
modify the wave profiles and influence the static equilibrium, mooring system, and motion dynamics of the
FOWT.
The results reveal that the translational motion responses, such as surge and heave, are affected by wave–
current interaction, with mean and maximum values decreasing under a following current and increasing under
an opposing current. However, rotational motion responses are minimally affected. Wave–current interaction
also notably affects maximum mooring tensions, with variations of up to ±22% depending on the current
direction and mooring layout. Furthermore, reductions in maximum longitudinal acceleration are observed
due to such interaction. Incorporating wave–current interaction in simulations enhances our understanding of
FOWT dynamics and allows for more reliable estimations of system behaviour, emphasising the importance of
ensuring safe operating conditions, particularly in sites with opposing currents.