| Based on the background of ecological civilization construction,the choice of clean and renewable energy has become the focus of energy construction.Offshore wind energy,as one of the new renewable energy sources,has always attracted much attention.However,with the increase of site depth,the cost of platform foundation increases sharply.Therefore,it is most economical to choose floating foundation as the foundation of offshore wind turbine platform in deep water area.In this paper,a new type of floating offshore wind turbine platform was selected based on the comprehensive consideration of economy and safety.From the perspective of the whole life design of floating offshore wind turbine,and based on the objective of being easy to install,replace,maintain and remove,a new type of tension-leg dual-module floating offshore wind turbine structural system was proposed.The multi-body hydrodynamic coupling and mechanical coupling effects of the wind turbine modules and platform modules are considered comprehensively.In getting the new wind turbine platform compared with the traditional advantages,at the right position to join the wind power installation vessel,considering the wind turbine module and platform module and the mechanical coupling function of wind power installation vessel and multi-body hydrodynamic coupling simulation of the installation and removal of offshore wind turbine,according to the related parameters obtained verify its feasibility,and using the correlation parameters provide reference for subsequent actual wind turbine installation and removal.The main research contents and results of this paper are as follows:(1)Put forward a new kind of tension leg type double module floating offshore wind turbine platform system,considering the tension leg platform module and DTU 10 MW wind turbine module of multibody dynamics coupling effect,respectively,set up double floating body module platform system and its corresponding monomers hydrodynamic model of platform structure,comparative study is mainly focused on the typical waves under the new double floating body module platform system and its corresponding monomers main dynamic response characteristics of tension leg platform structure.(2)The study of double floating platform module platform system and its corresponding monomer structure dynamic response parameters under various sea condition,the analysis and comparison of tension leg type double module surge response of the floating wind turbine platform increases with the increase of wave period,and the surge displacement response amplitudes significantly less than the corresponding single platform structure,mainly due to the former the cause of the surge of additional quality was significantly greater than the latter;The maximum stress of the tension leg of the two-module floating wind turbine platform structure system is slightly greater than that of the single platform structure.Therefore,the optimal design of the tension leg structure can be fully considered in the subsequent research.(3)The dynamic response of the new tension-leg dual-module floating offshore wind turbine platform system during the installation process is calculated and analyzed,which provides a reference for its installation plan.The best placement distance and position of the typical installation ship are analyzed and determined.And the sleeve auxiliary scheme is proposed to improve the surge response between the WT and the platform,and the numerical results verify the effectiveness of the improvement measures.Using parameter sensitivity analysis to determine the appropriate Fender parameters(4)The dynamic response of the new tension-leg dual-module floating offshore wind turbine platform system during the removal process is calculated and analyzed,which provides a basis for the selection of removal sea conditions.The influence of cable pull-out speed and tower tube displacement on the dynamic response of the structure is studied respectively,and the appropriate cable pull-out speed is determined. |
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