An Experimental Analysis on the Motion Response of a Moored Semi-Submersible Platform in Regular Waves

J. Ocean Eng. Technol. 1988;2(1):59-70.

계류된 반잠수식 시추선의 운동특성에 관한 실험적 고찰

홍사영,이판묵,홍도천

한국기계연구원 대덕선박분소,한국기계연구원 대덕선박분소,한국기계연구원 대덕선박분소

Keywords: semi-submersible platform, resonance, mooring system, pre-tension

핵심용어: 반잠수식 시추선, 공진, 계류시스템, 초기인장력

Abstract

This paper presents the results of motion tests of a moored semi-submersible platform in regular waves. To investigate the effects of mooring system on the motion characteristics, the tests were performed under the various mooring conditions in regular head and beam waves. Two types of mooring system were employed: one is composed of soft springs and the other is of chains. In the case of chains the pretensions were varied to investigate the dynamic effects of mooring forces as well as the motion responses of the semi-submersible. The motion responses and mooring tensions were measured and analyzed by the double amplitude method. The measured motion responses were also compared with the results of calculation from three-dimensional potential theory. Finally, the dynamic behaviors of mooring chains were studied.