典型潮差条件下半潜浮式风机系泊系统设计及动力学特性研究

Design and research on dynamic characteristics of mooring systems of semisubmersible wind turbine considering large tidal ranges

针对适用于中等水深的钢筋混凝土浮式风机平台,设计4种不同的悬链式系泊系统,利用一体化分析软件Sima进行耦合时域分析,从而得到运行和停机工况下不同潮位对应风机基础的运动响应及锚链张力特性。研究结果表明:相较于锚链−压载块组合系泊系统,锚链−浮筒组合系泊系统对应的系泊张力和纵荡位移均值受潮位变化的影响较小,增加系泊线数量会显著降低锚链−浮筒组合系泊系统对应平台纵荡和系泊张力受潮位变化的影响,但锚链−浮筒组合系泊系统对应的张力幅值在不同工况下均比锚链−压载块组合系泊系统的张力幅值大,在停机工况下张力幅值大50%左右。

Four alternative catenary mooring systems were designed for the conceptual reinforced concrete floating platform for wind turbine suitable for medium water depth, and time-domain coupled analysis of the floating wind turbine with different conditions and tidal levels was carried out using aero-hydro-servo-elastic coupled tool Sima.The response of the response of platform motion and the characteristics of mooring line tension was compared for those different mooring systems. The results show that compared with the combined mooring system of mooring chain and ballast block, the effects of tidal level change on the mooring tension and the surge motion corresponding to the combined buoy-chain mooring system are less than those of the combined clump-chain mooring system. Increasing the number of mooring lines can significantly reduce the effects of tidal level change on the mooring tension and the surge motion of the floating platform with the combined buoy-chain mooring system. However, the tension amplitude of the combined buoy-chain mooring system is larger than that of the combined clump-chain mooring system in different conditions, which is about 50% larger in the parked condition.