关键词: 海上风机基础, 优化设计, 有限元方法, 试验设计方法, 粒子群算法

Abstract: The significant design redundancy in the offshore wind turbine infrastructure results in high construction costs for offshore wind turbines. The design of the jacket offshore wind turbine should be optimized to improve the economic benefits of the structure. Firstly, the environmental load of the offshore wind turbine is simulated based on the data from the sea trial to obtain the time history of the environmental load of the offshore wind turbine. Secondly, the strength of the flat box girder type four-pile jacket offshore wind turbine infrastructure is checked by using the finite element method, indicating that the structure can be lightweight. Finally, with the target response of the maximum average stress, maximum displacement and mass of the structure, the contribution and main effect relationship of the structure scantlings to the target response of the structure are obtained by the optimization method combing the design of experiments (DOE) with the particle swarm optimization (PSO) algorithm, and the optimized structure scantlings are determined. The structural optimization of the offshore wind turbine infrastructure can reduce the construction costs while ensuring safety. It can provide parameter references for subsequent design and construction of the offshore wind turbine infrastructure.

Key words: offshore wind turbine infrastructure, optimization design, finite element method, design of experiments(DOE) method, particle swarm algorithm