Study of Stress-Monitoring Method in Supporting Structure of Floating Offshore Wind Turbine

This paper presents a new stress-monitoring method in the supporting structure of a floating offshore wind turbine (FOWT). Though monitoring many points is preferable when making the maintenance plan and residual fatigue life prediction of the structure, measurement of these quantities is not realistic. Instead of direct measurement, the authors propose a method of estimation from motions that are easier to measure. The feasibility of the method was confirmed by a tank test with a spar-type FOWT.