Abstract
ABSTRACT There has been little analytical study to clarify the relationships among the mooring chain configuration, the caisson padeye depth, the tensile load induced at the caisson padeye, and the horizontal load at the spar fairlead of a floating offshore wind turbine (FOWT). To elucidate the interaction within the integrated system comprising the suction caisson anchor, the mooring chain, and the spar buoy, a comprehensive analytical method of the mooring system was proposed using a three-dimensional displacement method. From the predicted results for the case study of the two suction caisson anchors with different padeye depths, it was found that (1) For the suction caisson anchor with the padeye set on the 2/3 embedded depth, pullout occurs at the horizontal load which is the 71% designed ultimate horizontal load on the fairlead. (2) For the suction caisson anchor with zero padeye depth, no pullout arises for the designed ultimate horizontal load.
Published Version
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