Research On Structural Optimization Design And Software Development Of Jacket Offshore Wind Turbine Transition Section

Offshore wind power has innate advantages that unmatched by onshore wind power,and has been highly valued and developed vigorously by the country in recent years.With the continuous expansion of installed capacity and power generation scale,the construction cost of offshore wind turbines has gradually increased,which has become the main factor restricting the further development of the offshore wind power industry.Practice has shown that the cost of offshore wind turbine infrastructure accounts for up to 24%.How to reduce wind turbine costs has become a current research hot issue;therefore,it is of great significance to optimize the design of wind turbine foundations under the premise of ensuring structural safety and performance.Firstly,this paper adopts extreme environmental conditions to simulate the FAST dynamic response of the jacket-type offshore wind turbine,and outputs the load time sequence at the bottom end of the tower tube.the Peak factor coefficient corresponding to the load time history is obtained by the Translation process method,and on this basis Solving the extreme load is used in the optimal design of the wind turbine.Then,for the transition section of the offshore jacket wind turbine,the coupling constraint equation principle is used to build the finite element multi-scale optimization model of the beam and the solid element.the Bi-directional evolutionary structural topology optimization method is introduced,and the Matlab programming is used to achieve the maximum stiffness and the minimum global stress.Topology optimization design for the transition section of the wind turbine under the constraints of target and volume.The material reduction and lightweight design of the transition section structure can better reduce the quality of the wind turbine and save the construction cost on the premise of ensuring the safety performance of the structure.Subsequently,the optimization result was reconstructed by the reverse engineering smooth model to realize the smooth processing of the optimization result boundary.the limit state and fatigue cumulative damage of the structure before and after the optimization were analyzed and compared to verify the feasibility of the transition section optimization technology.Finally,on the basis of the domestic independent research and development Li To Sim platform,an optimized numerical calculation program is embedded to form a customized software TUR/TOPT for the topology optimization of the transition section of the offshore wind turbine.Using the TUR/TOPT platform to compare the results of traditional stiffness optimization and stress optimization of the transition section,it highlights the advantages of stress optimization in the process of material reduction optimization design in significantly reducing structural stress and effectively avoiding stress concentration;the TUR/TOPT software is generated in It has important guiding value in the selection process of wind turbine construction.