Dynamic Response Analysis Of Tension Leg Platform Floating Offshore Wind Turbine

With the continuous improvement of China's industrialization level,a large number of the use of fossil fuels has brought a very serious environmental disaster.Therefore,wind energy,as a green energy,is developing rapidly.Offshore wind power generation has become a hot topic in recent years due to its abundant resources and abundant wind energy resources.The tension leg floating foundation platform(TLP)has the advantage of semi-rigid compliance,and excellent response under extreme environmental loads.The dynamic response performance of the platform is an important factor to evaluate the coupling charac teristics of the floating wind turbine system.Therefore,it is of great practical significance to study the dynamic response performance of TLP floating wind turbine platform.The main contents are as follows:First of all,in the basic theory research process,the multi-body dynamics coupling action of the TLP type floating wind turbine is analyzed,and the related basic dynamic characteristics and the external environment load are analyzed emphatically.Then,based on the theoretical analysis,the conceptual design of TLP type floating platform is put forward,and the hydrodynamic model of floating wind turbine is established.The hydrodynamic characteristics and the additional mass and potential flow damping in frequency domain are analyzed,and the hydrodynamic parameters such as the wave load acting and the motion Response Amplitude Operators(RAO)are calculated.Finally,the time domain coupling characteristics of the floating wind turbine platform are calculated by using the numerical model designed in this paper.Firstly,the coupling effect of wind turbine on TLP floating platform is analyzed.Considering the combined action of wind and wave of environmental load,a nonlinear time domain simulation method to analyze the hydrodynamic response of without wind turbine coupling platform and coupling platform.The tension leg mooring system tension response amplitude time history is also analyzed.The results show that the coupling motion of the wind turbine excited the low frequency motion of the floating platform,such as surge,sway,and yaw motion.The heave and roll motion show high frequency characteristics.The tension response of the tension leg mooring system increases considerably when coupled,and the #1 tension leg is most affected by the platfo rm pitching motion.Secondly,considering the complex marine environment in the South China Sea,the effect of wind and wave loads on the combination of a floating wind turbine platform is evaluated.In this paper,the results of the motion response of the platform are obtained under different incident angles and sea conditions.The response characteristics of tension amplitude of tension leg mooring are also obtained.Thirdly,the different effects of Cross type ocean environment on the dynamic response of the system are discussed.In this paper,a new type of TLP offshore wind turbine floating platform is designed.Furthermore,the frequency domain characteristics and time domain dynamic coupling characteristics are analyzed,which will be of guiding significance for further research on deep-sea floating wind turbines.