点击次数：

发布时间：2019-03-11

论文类型：会议论文

发表时间：2010-06-20

收录刊物：Scopus、EI

卷号：1

页面范围：246-253

摘要：This work presents 1:100 scale model tests of a semi-submersible platform, with a 1500m full-depth mooring system conducted model test in the Joint Laboratory of Wind Tunnel & Wave Flume at the Harbin Institute of Technology. A truncated mooring system with the water depth of 400m designed that ensures the static restoring force characteristics of the full-depth mooring system, are retained. A numerical simulation of the mooring line dynamics is executed in the time-domain, based on the non-liner finite element method to determine the differences in the dynamic behavior of the full-depth mooring line and truncated mooring line. The energy dissipated by a mooring line as a result of its oscillation is applied to calculate the damping of the mooring line under regular oscillations. The top-tension, spectrums of the truncated mooring line model and the corresponding full-depth mooring line are compared under irregular oscillations to ensure similarity under realistic sea conditions. The tensions of a mooring line were recorded when the semisubmersible platform was oscillated under regular or irregular wave excitation in the horizontal plane. The semi-submersible platform was model tested at selected regular wave excitations. The period of wave excitation changed from 6 seconds to 60 seconds and three different heights were used at each period. Finally, the semi-submersible platform was model tested under 10 year wave conditions for the South China Sea. Copyright ? 2010 by The International Society of Offshore and Polar Engineers (ISOPE).