Jacket Offshore Wind Turbine Infrastructure Optimization Design

Global wind power technology has advanced quickly in recent years.Wind power generation has emerged as one of the crucial energy sources for the nation’s sustainable development as a major energy consumer,and the location of wind turbine construction has gradually changed from land to sea.Numerous offshore wind turbines have been installed in China’s coastal regions,and as technology has matured,the question of how to limit building costs has gained attention.By effectively lowering its construction costs,the offshore wind power industry will be better able to flourish.In engineering practice,the cost of offshore wind turbine infrastructure often accounts for more than 20%.In order to address this issue,the Institute’s offshore wind farm project’s large-diameter non-inlaid rock four-pile conduit frame offshore wind turbine foundation was chosen as the research object.A reasonable optimization design of the wind turbine foundation structure is carried out to ensure structural safety on the presumption that optimizing the light weight of the wind turbine foundation to achieve.In order to compare the model’s static strength and fatigue life before and after optimization,the research uses finite element analysis.The findings can serve as a reference for the design and construction of offshore wind turbine foundation structures in the future.Here is the primary piece of work:(1)The wind and wave environmental loads acting on the offshore wind turbine foundation are simulated using aerodynamic and hydrodynamic principles,combined with the wind and wave spectrum models,and the time course curves of the environmental loads are obtained.A finite element model of the four-pile conduit frame offshore wind turbine foundation structure with measured 50-year wind and sea conditions is then created.To achieve the optimization of the wind turbine foundation structure form,the structural strength of the three models is compared using the static analysis method,strength checks are carried out,and the best transition section connection form is discovered.(2)The target response is chosen as the maximum average stress,maximum displacement,and mass of the wind turbine foundation structure using multiple material dimensions as design factors,and the DOE experimental design analysis of the model is carried out using the optimized Latin hypercube design method to determine the contribution of material dimensions to the target response of the structure and the main effect relationship;Additionally,the setting factor is chosen based on the material dimension with the highest overall contribution value and the material yielding To further achieve the optimization of the material size of the foundation structure,the material size with the highest contribution value is chosen as the setting factor,the yield strength of the material is used as the constraint to optimize the global multi-objective algorithm,and the optimal structural size is determined by the particle swarm algorithm.(3)Before and after optimization,the model is subjected to steady-state analysis to determine the structural fundamental frequency and resonance review.Next,the structure is subjected to harmonic analysis based on the results of harmonic analysis to determine the harmonic spectrum of structural stress and deformation.Finally,based on the outcomes of the harmonic analysis,the power spectral density function of the combined environmental load,the fatigue life analysis of the model before and after optimization,the confirmation of the service life of the wind turbine infrastructure,a comprehensive safety analysis,and an economic analysis of the optimization effect.