Dynamic performance of a semi-submersible platform subject to wind and waves |
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| Authors: | Hang Zhu Jinping Ou |
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| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P. R. China
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P. R. China;School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, P. R. China |
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| Abstract: | 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. |
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| Keywords: | semi-submersible platform wind waves numerical simulation experimental simulation |
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