Optimization Of Connection And Support Structure For Twin-barge Float-over Installation Of Offshore Wind Turbines

With the development of large-scale offshore wind turbines,the weight increases and the structural height also increases,and the existing wind turbine installation ship resources cannot meet the installation requirements of large offshore wind turbines.Therefore,there is a need for a method and equipment that are different from the traditional offshore wind turbine installation,and can not be limited by the height and weight of the wind turbine.In this paper,a 10 MW offshore wind turbine is taken as the research object,and the simulation and optimization of the twin-barge float-over installation support structure and the buffer damping device under complex working conditions during the installation of the offshore wind turbine are studied.Based on the comparative analysis of the existing offshore wind turbine installation methods at home and abroad,combined with the advantages of the twin-barge float-over tow method for installing offshore platform blocks,a convenient and fast new twin-barge float-over installation method for offshore wind turbines is proposed.First,on the premise of clarifying the design basis and stability calculation of the twin-barge float-over connection support structure,the overall scheme of the hydraulic double-vessel connection structure is determined,and the twin-barge float-over connection support structure is designed based on each load analysis.Secondly,the hydraulic design and selection of the hydraulic buffer device on the connection structure of the two ships is carried out,and the AMESim software is used to model and simulate the working principle of the hydraulic buffer device after being subjected to the impact load of the wind turbine.According to the simulation data,the genetic algorithm is used to optimize the hydraulic circuit flow parameters,pipe diameter,liquid flow rate and accumulator,so that the hydraulic system can achieve the best buffer effect.The finite element modeling of the twin-barge connecting support structure was carried out by Abaqus software,and the finite element analysis was completed for each working condition.Finally,using Isight software and the sequential quadratic programming algorithm,the weight optimization design of the support structure and the twin-barge connection structure designed in this paper are carried out respectively,so as to obtain the optimal plan of the twin-barge connection support structure that meets the constraints.The research results of this paper provide theoretical support for the practical application of the twin-barge connection support structure.