海上风电机组固定式支撑结构环境敏感性分析及极限工况下的一体化设计

Environmental Sensitivity Analysis and Integrated Design on Extreme Situation of Fixed Support Structures for Offshore Wind Turbine

本文通过对各种环境、荷载条件下的单桩基础和导管架基础进行初步设计计算,分析比较了各类环境、荷载参数对海上固定式风机基础的影响及敏感性,得到了这些参数对基础结构用钢量的影响规律。单桩基础对基础顶部弯矩和海水深度变化最敏感,导管架基础则对波高的变化最为敏感,并且与单桩基础相比,导管架基础对环境参数的变化表现出了更高的敏感性。通过建立风机-塔筒-基础的一体化模型,实现了海上固定式风电机组在极限工况下的一体化分析与设计,并将一体化设计结果与传统迭代设计结果对比,结果表明采用一体化设计可明显降低构件的内力及基础结构的材料用量。

In this study the influence law of various environment and load parameters on the steel consumption of the monopile and jacket was obtained by analyzing the sensitivity and influence of these parameters on the fixed offshore wind turbine foundation through preliminary design and calculation of the foundation under various environmental and load conditions.The monopile was the most sensitive to the change of the bending moment at the top of foundations and the water depth while the jacket was the most sensitive to the wave height.Compared to the monopile the jacket was more sensitive to the change of environmental parameters.By building an integrated model of wind turbine-tower-foundation integrated analysis and design of fixed offshore wind turbines in extreme situation was achieved and the integrated design results were also compared with traditional iterative design results.It showed that the integrated design could significantly reduce the internal force of the components and the steel consumption of the foundation.