| With the large-scale development of offshore floating wind turbine, the integrated coupling analysis of floating wind turbine is becoming more and more important. The Simo-Riflex-Aerodyn simulation tool is used to establish an integrated coupled model of the OC4-Deepcwind floating wind turbine, and to analyze the effects of parameters such as time step, initial cut-off time and discrete number of elastic structural elements on the simulation results, including the floating foundation motion, mooring line force, blade force, etc. The results show that when the calculation time step is 0.005 s, 0.01s and 0.02 s, the difference in the response results of the floating wind turbine is small, but the calculation consumption time has a large difference, with 0.01 s and 0.02 s consuming 70% and 37% of the computational time required for 0.005 s. Under the same working condition, the time required for different parameter responses to reach stability differs, with surge requiring the longest time, reaching stability at a maximum of 200 s； Under different working conditions, the time required for the same parameter to reach stability is different, and the time required for cut-out is the shortest, which is faster than that of the rated condition by about 60 s. The discrete number of structural element has smaller influence on the force of tower column, but
relatively obvious influence on the deformation of blade. When the discrete number of blade decreases, the response value increases by 12%. In practice, reasonable calculation time step, initial cut-off time and discrete number of elastic structural elements are selected according to specific working conditions. |
