Abstract
The offshore wind turbine (OWT) supported by bucket foundations can be installed in the integrated transportation process by a dedicated vessel. During the integrated transportation process, the wind turbine is considered as a coupling system with the transport ship, which is easily influenced by waves and storms. In view of the motion response and influential factors, the heave and rock stiffness of the entire floating system was proposed, and then the analytical dynamic motion model of the coupling system was established based on the movement mechanism of the traditional floating body in the wave in this paper. Subsequently, the rationality of the proposed motion model was verified based on the field observation data, with the maximum deviation of the motion responses less than 14%. Further, the influence on the heave and pitch motion of the coupling system considering different factors (vessel speed, wave height, wind speed and wave angle) and the factor sensitivity were discussed by the novel analytical model. It is explained that the heave and pitch motion responses rise with the increase of the wave height and wave angle. Simultaneously, the responses decrease as the vessel speed increases considering sailing along the waves. On the contrary, the responses show an obvious increasing trend with the increase of vessel speed in the case of the top wave sailing. In addition, it is also illustrated that the wave height has the greatest influence on the heave and pitch motion responses, followed by the vessel speed. The wave angle has the lowest sensitivity when the heave and pitch motion are far away from its harmonic resonance region.
Highlights
Offshore wind energy has become the focus of renewable energy development due to its enormous energy potential, high wind speed, low turbulence and no occupation of cultivated land
The analytical motion model was derived based on regular waves and was suitable for shallow water area with small wave height
It is assumed that the heave and pitch motion in the entire system are far away from their harmonic resonance regions, and the wave period remains constant at 9.05 s
Summary
Offshore wind energy has become the focus of renewable energy development due to its enormous energy potential, high wind speed, low turbulence and no occupation of cultivated land. It is oftogreat significance to characteristics study the dynamic of the the wind turbine and bucket the vessel during the integrated transportation coupling system on of the novel wind bucket turbinefoundation on the novel foundation and the vessel during the process. It is concluded that a smaller draft and a greater air cushion of the draft and aircushions on the dynamic characteristics of the system was studied It is concluded in the foundation are beneficial to a safe transportation process [10]. MOSES to simulate the transport vessel carrying two novel bucket foundations together with the upper offshore wind turbines and analyzed the influence factors of motion response [11]. OWT on the novel bucket foundation with vessel during the transportation process, was established by both the theoretical derivation method and field measurement data analysis.
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