LEARNING FROM FIELD TEST REGARDING DAMPING OF A FLOATER MOTION -2MW FOWT “FUKUSHIMA MIRAI”-

Abstract

In Fukushima Demonstration Project, 2MW FOWT “Fukushima Mirai” has produced electricity for four years since November 2013 without major trouble. During the demonstration, field test data have been obtained and analyzed. In WT emergency shutdown test the floater was in free roll condition and decay of motion was recorded. The data was used to modify a numerical model. In this pater damping of floater motion is compared between water tank test and field test. Discussion on damping was given and the design based on the tank test is found to be in safe side.