海上风电潜式张力腿平台整体浮运安装技术研究

RESEARCH ON FLOATING INSTALLATION TECHNOLOGY FOR SUBMERGED TENSION LEG PLATFORM OF OFFSHORE WIND TURBINE

对一种新型潜式张力腿平台风电机组及系统整体浮运安装技术进行研究,提出2套配套的施工沉放方法来实现这种结构的一体化安装。运用水动力软件MOSES对单体拖航和加辅助浮筒的湿浮拖航过程分别进行了数值模拟。基于绞缆下沉安装过程与注水施工沉放过程,分析了整体结构在不同工况下的运动响应。分析结果表明,加辅助浮筒拖航具有更好的稳定性;浪向角相对于浪高对结构在绞缆定位安装过程的运动和张力腿张力的影响更大,但整体变化趋势保持一致;结构在注水下沉过程中的垂荡和接触力变化幅值随海况的增大而增大,但整体响应随时间变化的趋势保持一致,纵摇、横摇及艏摇最大值均较小,不作为控制因素指导施工。

The towing and integrated installation techniques are analyzed for a new submerged tension leg platform of offshore wind turbine. Two sets of towing and sinking techniques are proposed to realize the integrated installation of the submerged tension leg of offshore wind turbine. Numerical simulations are carried out on the wet towing process with and without auxiliary pontoons by using the hydrodynamic software MOSES. Based on the installation process of cable sinking and the sinking process of water injection construction,the motion response of the whole structure of the proposed offshore wind turbine under different working conditions is analyzed. The results show that the better floating stability can be obtained by adding the auxiliary pontoons to the system. The motion response amplitude and the force amplitude of the structure are more sensitive to the wave direction than to the wave height under the cable positioning installation,while the overall change trend is consistent. The heave motion and contact force under the water injecting installation process increase with the rise of the wave,but the variations of the time series are similar. The angular motions will not be considered as the control condition because the maximum values are small.