Wave Response Research On Floating Offshore Wind Turbine Structure With Separated Buoy

Floating offshore wind turbine platform for the development of offshore wind resources has a profound significance and a significant impact on modern sustainable development.As a kind of floating platform,tension leg platform has good motion performance,wide adaptability range for deep water and been caused wide attention.At present,the design of floating platform for wind turbine is still in the conceptual design stage.In order to solve the problem that the horizontal motions constraint of the tension leg platform are weak and the motion responses are not easy to control,a tension leg platform with separate appendage buoy is proposed,and made a numerical simulation and scale experimental study.According to the characteristics of floating platform,based on the existing tension leg platform model,the appropriate theory is selected and new models are put forward.The mass,geometric attributes and mooring forces of the existed model is calculated by using the script file,and the rationality is verified by comparing with the existed results.Then,the new models are solved accordingly.The kinetic parameters of the new models are analyzed.The results show that the additional mass coefficients and damping coefficients of the new platforms will increase when the separate appendage buoy is considered,which may lead to the decrease of the platform responses.Based on the results of the script file,the numerical simulation models based on the amplitude response operator(RAO)is solved.Compared the differences between the different models.The results show that the addition of the separation buoy will increase the additional mass coefficients and the damping coefficients of the tension leg platform,and change the size relations of each degree's RAO in different frequency range.It is clear that considering the separate appendage buoy can be used to change the dynamic characteristics of the structure itself.But the separate appendage buoy may not absolutely reduce the dynamic responses of the platform.A1: 80 scale experiment was designed for the dynamic responses of the separate appendage buoy platform models.In the Harbin Institute of Technology Wind Tunnel and Water Flume laboratory completed the entire experiment.Comparing the dynamic responses of the models without considering the separate appendage buoy and considering the different dimensions of the separate appendage buoy,including the displacement responses and the acceleration responses,under different operating conditions.The results show that the models which the separate appendage buoy is considered to be excellent in some operating conditions,but the specific size of the separate appendage buoy is not the same as the condition do not considering the separate appendage buoy.It is verified that the separate appendage buoy does not absolutely reduce the dynamic responses of the platform.