This thesis reports about the case study of fatigue analysis based on the observed oceanographic data. Presumed wind power generation facility for analysis consists of the tower which has a 2400kW generator, and mono-pile foundation constructed on the bottom of the sea depth 10m outside the breakwater. Fatigue analysis was executed by zero-upcrossing method and rain-flow method.It was concluded that a fatigue life of offshore wind power generation facility could be analyzed by those methods, and it was proved that the facility with the mono-pile foundation has a long enough fatigue life even when it couldn't be repaired with the inspection prescribed by DNV.
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