Dynamic Performance of a Semi-Submersible Platform Subject to Wind and Waves

• Published in: Journal of Ocean University of China Vol. 10; no. 2; pp. 127 - 134
• Main Authors: Zhu, Hang, Ou, Jinping
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science Press 01.06.2011; Springer Nature B.V; School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, P. R. China; School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P. R. China%School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P. R. China
• Subjects: Earth and Environmental Science; Earth Sciences; Meteorology; Oceanography; Water depth; Wave power; Wind; 动态性能; 半潜式平台; 应用实验; 数值模拟; 模型试验; 系泊系统; 运动性能; 风浪; waves; semi-submersible platform; numerical simulation; experimental simulation; wind
• ISSN: 1672-5182; 1993-5021; 1672-5174
• DOI: 10.1007/s11802-011-1755-z

By applying experimental and numerical simulations, the motion performance of a semi-submersible platform with mooring positoning system under combined actions of wind and waves is studied. The numerical simulation is conducted by the method of nonlinear time domain coupled analysis, and the mooring forces are calculated by the piecewise extrapolating method. The scale in the model experiment is 1：100, and the mooring system of the model is designed with the method of equivalent water-depth truncation by comparing the numerical and the experimental results, the platform motion and mooring forces subject to wind and waves are investigated. The results indicate that the numerically simulated mooring forces agree well with the experimental results in static equivalent field, but show some difference in dynamic equivalent field; the numerically simulated platform motions coincide well with the experimental results. The maximum motion of the platform under operating conditions is 20.5 m. It means that the horizontal displacement is 2% less than the water depth, which satisfies the operating requirements.