A Scheme Design For Transport Of Offshore Wind Turbine

Wind energy as a kind of clean, non-polluting and renewable energy, is attracting more and more attention. At the same time, Wind power as one kind of the renewable energy development projects arouses common concern to all countries of the world. Compared with the land-based wind farm, offshore wind farm has its obvious advantages, including high speed, low wind shear, low turbulence, high output. Recently more and more people pay their attentions to the offshore wind farm. However, during the offshore wind farm construction, the wind power's transportation and loading is a difficulty for the designer. Therefore, how to design a reasonable transportation scheme to ensure the transport security is a prior problem to be solved.The background of this thesis was China's first wind power demonstration project which was installed a 1.5 MW wind turbine on a jacket in Suizhong 36-1 oil field. In this thesis, wind turbine's overall transport and safety of it were researched.Firstly, the aerodynamic loading data were processed, which was separating the static loads from dynamic loads. Then, to minimize the wind capsizing moment, the optimal position angle of blades and optimum facing angle of wind turbine were designed.Secondly, the static equilibrium of barge after loading the turbine on it can be used ballast to adjust. So five different ballast schemes were designed and the stability for each case was checked to confirm the designs satisfy the criterion requirements.Thirdly, software SESAM was applied to analysis the motion response of the six degrees of freedom. Then numerical results were compared with experimental datum to confirm the accuracy of calculation. The barge motion response in irregular wave was calculated by spectrum analysis method. According to the calculation results, the optimal scheme which made the rolling angle and rolling acceleration minimum was chosen. In conformity to the results calculated by the maximum motion response of different courses, the reasonable courses on which the transport safety of barge can be ensured in the working sea area was selectedFinally, structural analysis software ANSYS was used for analyzing the dynamic response of the tower structure. A static analysis approach was adopted to analyze and simulate the dynamic response of the tower structure. And the maximum load the tower can bear was calculated to find the most dangerous state of the structure.