半潜式平台结构尺寸对海上风电机组稳定性的影响研究

Impact of Structural Dimensions of Semi-submersible Platform on the Stability of Offshore Wind Turbines

以IEA 15 MW漂浮式海上风电机组和UMaine VolturnUS-S半潜式平台为研究对象,提出一种风电机组浮式平台结构的尺寸设计流程,基于Ansys Aqwa水动力分析软件和OpenFAST仿真分析软件对浮式平台的各部件尺寸参数进行稳定性分析,研究了不同立柱间距、侧柱高度、侧柱直径、浮箱高度、浮箱宽度和垂荡板直径对风电机组整体动态响应和系泊缆张力的影响,探究了各尺寸变化对风电机组稳定性的影响规律。结果表明:增大立柱间距和侧柱直径可以显著提升漂浮式风电机组在工作运行时的整体稳定性,侧柱高度在水面线以上时进行尺寸变化对风电机组稳定性几乎无影响,浮箱宽度和浮箱高度主要影响垂荡方向的运动响应,增大垂荡板直径明显提升了浮式平台纵摇和垂荡方向的稳定性。

Taking IEA 15 MW floating offshore wind turbine and UMaine VolturnUS-S semi-submersible platform as research subjects,a structure design process of wind turbine floating platform was proposed in this study.The stability analyses on the dimensional parameters of each component in the floating platform were conducted using Ansys Aqwa hydrodynamic analysis software and OpenFAST simulation analysis software.The impact of column spacing,side column height,side column diameter,pontoon height,pontoon width,and heave plate diameter on the overall dynamic response of wind turbine system and mooring cable tension was investigated.The effect of dimensional changes on the stability of wind turbine system was explored.Results show that increasing the column spacing and side column diameter can significantly enhance the overall stability of floating wind turbine system during the operation.The changes of side column height above the waterline have almost no impact on the stability of wind turbine system.Pontoon width and pontoon height primarily affect the motion response in the heave direction,while increasing the heave plate diameter significantly improves the longitudinal and heave direction stability of floating platform.