Reliability-based design optimization of a spar-type floating offshore wind turbine support structure

The application of reliability-based design optimization (RBDO) methods to offshore wind turbine systems is highly relevant regarding economic efficiency and for considering prevailing uncertainties within the process. Furthermore, RBDO a very promising approach in optimizing when classification standardization are not fully available. level difficulty already increases including reliability aspect, but becomes even more challenging dealing with complex system floating turbines (FWTs), which has yet been applied. Thus, this paper presents first time an integrated framework FWTs, combining concepts advanced modeling, requiring reasonable computational effort expenditure. In preprocessing, environmental conditions, limit states, specified, appropriate assessment elaborated, response surfaces various geometries space generated ahead execution. These finally used by means interpolation calculation iterative optimization. On example spar-buoy FWT system, presented methodology feasibility coupling shown. • Combining assessment. developed its kind. Time efficient realization through surface-based approach. Optimization uncertainties, criteria. Consideration fully-coupled dynamics.