The floating platform undergoes six degrees-of-freedom of motion in the marine environment

making the flow field around the blade fluctuate drastically

and the changing flow field will have a huge impact on the dynamic response of the blade. A two-way fluid-structure interaction simulation of the NREL 5 MW wind turbine was carried out using the CFD-CSD coupling method. Based on this

the UDF technique introduced the floating platform motion to study the blade deformation and the overall torque and thrust changes under the surge

pitch

and yaw motion. The results show that the three typical platform motions of the surge

pitch

and yaw make the blade deformation amplitude increase

and the increase of flapwise and torsional deformation is more significant than that of edgewise deformation; the surge motion has the greatest influence on the blade deformation and aerodynamic performance

the maximum change range of torsional deformation can reach 70%

the peak values of the torque and thrust are increased by 30.51% and 11.75% respectively; the pitch and yaw motions reduce the average torque and thrust.