Floating Analysis Of Integrated Installation Technology With Offshore Wind-Power Structure

Integrated installation technology with offshore wind-power structure achieved the overall installation of foundation and wind turbines. This new installation method had greater superiority than the traditional installation method. The floating analysis is an important component of the integrated installation technology. In this paper, ocean engineering software MOSES was used to simulate the transport ship and the influence factors were analyzed. The effect of initial floating state of the transport ship and the seakeeping capability of the ship were studied.After a comparative analysis, during the floating of the wind-power structure transport ship, when the draft of wind turbine structure decreased, floating was more stable. When the draft was below 4m, the effect of draft of the wind turbine structure was not significant and the draft of 4m can be set as a safe draft. At the same time, when the draft difference between inside and outside wind turbine structure was greater, floating was more stable. But the draft difference should be limited to ensure the inside draft are deep enough which can prevent the overflow of the inner gas.The floating of the transport ship under following waves is safer than under head waves. During head waves, the inside draft of the wind turbine structure should be deep enough to prevent the overflow of the inner gas. The impact of wave height on towing force and vertical motion is great. When the ship was about to capsize, the tension of cable tension and the air pressure of the foundation changed abruptly which can help us to assess the condition of the ship. Some certain measures could be taken immediately.When the wind and wave are small, the draft of the wind turbine structure can be decreased and inner air pressure of the foundation can be increased to make the transport ship float more smoothly. However, when the wave height was more than 2m, the draft of the wind turbine structure can be increased and inner air pressure of the foundation can be decreased to ensure the height of inside draft, which is Critical for the safety of the transport ship.