| During the offshore wind power construction process,the use of multiple vessels is necessary for the lifting and installation of wind turbine foundations and other main works.In this paper,a multi-floating body coupled numerical simulation is conducted to analyze the motion response of various vessels,including the lifting vessel,transport vessel,positioning barge,and jacket foundation,under different environmental conditions in the offshore wind power project located in the South Shandong Peninsula Sea.The safe operating environment window is assessed based on relevant specifications.The hydrodynamic characteristics of the barge in three different states-single vessel,barge-transport vessel alongside,and barge-crane vessel-transport vessel-are analyzed using Bentley MOSES software frequency domain calculations based on 3D potential flow theory.The resulting floating body motion amplitude response operator,added mass,and radiation damping coefficients are obtained.The calculation results reveal that hydrodynamic interference between operating vessels is significant and cannot be ignored.A time domain numerical analysis is carried out for the two phases of the offshore wind turbine foundation hoisting operation process,taking into account the hydrodynamic interaction between the operating vessels,and considering the real sea conditions in the South Shandong Peninsula Sea.The hazardous and safe operating conditions for the lifting and installation of the wind turbine jacket foundation in the South Shandong Peninsula Sea wind power project are assessed according to relevant codes.The time-domain calculations show that the lifting operation poses risks when the wave angle is at 90° and 270°,or when the wind speed exceeds13m/s.However,the motion response of the lifting vessel and the catenary foundation at different lifting heights remains within the safe operation limits.The results of the time domain coupling analysis of the lifting operation of the wind turbine jacket foundation provide valuable references for subsequent wind farm construction projects in the South Shandong Peninsula Sea wind power project. |
