Robust requirements and design optimization for offshore wind turbine structure utilizing approximate model technology

We discuss the robust design optimization (RDO) of the support structures of offshore wind turbines to decrease costs and variations considering uncertainties. First, an approximate model derived with design of experiment (DOE) methodology is introduced to replace the time-consuming computational dynamic response analysis of finite element (FE) models for reducing computational costs. Then, a deterministic optimization (DO) without considering the uncertainties is introduced for comparison. The results suggest the feasibility and efficiency of the whole framework of the RDO method, which can be a reference for the design of other offshore support structures