Wind Load Simulation and Dynamic Response Analysis of Semi-submersible Platform due to Wind and Wave Environmental Loads

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (18) : 112-117.

LI Fang-fei1, ZHOU Dai1,2,3 , MA Jin1, LU Jia-bao1,2,3,LIAO Li-heng1

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Abstract

In this paper, the numerical simulation of wind pressures and wind loads is conducted on semi-submersible platform, the wind and wave induced dynamic response of the semi-submersible platform and its mooring system is investigated. As engineering background, domestic 981 offshore oil drilling platform is taken out for analysis. Non-steady-state numerical simulation of the structure under different wind pressure loads, different dip angles and different wind directions is carried out on FLUENT software, the most unfavorable condition is determined on the numerical results. A finite element coupled model of a semi-submersible platform and the mooring system is established on ANSYS software. Through the FEM simulation, the dynamic response of semi-submersible platform system in the most unfavorable condition due to wind and wave environmental loads is obtained. On the basis of the numerical results, the dynamic response law is investigated. This work can be a reference analysis for the safety design of the offshore platform.

Key words

semi-submersible platform / mooring system / wind and wave load simulation / joint action / time history dynamic analysis

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LI Fang-fei1, ZHOU Dai1,2,3,MA Jin1, LU Jia-bao1,2,3,LIAO Li-heng1. Wind Load Simulation and Dynamic Response Analysis of Semi-submersible Platform due to Wind and Wave Environmental Loads[J]. Journal of Vibration and Shock, 2017, 36(18): 112-117

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