부유식 파력발전장치의 계류시스템 거동특성

Abstract

converter are analyzed in a numerical study. Case studies are carried out for different top excitations in the horizontal and axial directions induced by the surge and pitch motions of a floater. In the operational condition, the height of tension variation at the top end of a mooring line by top excitation in the axial direction is almost 2.5 times than that in the horizontal direction. The responses according to the excitation directions may be an important parameter to determine the connection point between a floater and the top end of a mooring line. It is found that top excitation with a long excitation period by slow drift motion of a floater induces a large excursion, resulting in large tension at the top end of the mooring line. From the perspective of designing a mooring system, different natural frequencies according to excursion distance and static configuration should carefully be considered