海上漂浮式风力机Spar平台结构优化设计探究

以NREL 5MW海上风力机OC3-Hywind型Spar平台为研究对象,建立平台有限元模型,采用有限元方法分析了100年一遇极端海况下Spar平台的结构强度,并在满足结构强度要求的条件下,采用响应面优化设计方法,以平台结构自身重量为目标函数,对平台的内部结构进行优化设计。优化结果表明:优化后平台的结构强度符合设计规范要求;平台内部的各种肋板与加强筋的结构尺寸更加合理,并减少了平台结构的用钢量,降低了Spar平台的建造成本。

Research on structural optimization design of Spar platform for offshore wind turbine

Based on the OC3-Hywind Spar platform of NREL 5MW offshore wind turbine, the finite element model of the platform was established. The structural strength of the Spar platform under extreme sea conditions was analyzed by finite element method. Under the condition of satisfying the structural strength requirement, the optimization design method of the response surface is used to optimize the internal structure of the platform with the weight of the platform structure as the objective function. The optimization results show that the structural strength of the optimized platform is in accordance with the design specification. The structural dimensions of various ribs and stiffeners inside the platform are more reasonable and the amount of steel used in the platform structure is reduced, which reduces the construction cost of the Spar platform.