海上风机导管架基础海水深度适应性分析
Analysis on adaptability of the seawater depth for offshore wind turbine jacket foundation
黄玉佩 1阙坤生 1周益君 1黄建武 1金涛 1戴炜 1陈鹏宇 1黄佳佳2
作者信息
- 1. 中国能源建设集团浙江省电力设计院有限公司,浙江 杭州 310012
- 2. 中国能源建设集团浙江省电力设计院有限公司,浙江 杭州 310012;浙江大学建筑工程学院 浙江 杭州 310058
- 折叠
摘要
海水深度是影响海上风电导管架基础技术性和经济性最重要的因素.为探讨海上风机导管架基础的海水深度技术可行性和经济适应性,基于三个具有不同水深的实际工程项目,利用SACS软件建立了风机-导管架-桩基础整体模型,分析海水深度对海上风机导管架模态、上部导管架结构静力和疲劳响应、下部桩桩基础下压和上拔荷载、工程量的影响.结果表明:(1)海水深度对导管架基础结构的自振特性影响较小;(2)在极端荷载工况下,导管架基础的最危险杆件位于导管架最底层下部,深水条件下导管架基础设计控制工况可能由疲劳工况转变为极限荷载工况;(3)深水条件下风浪流等水平荷载作用更加明显,导管上部结构荷载承担比例提升;(4)深水条件下导管架基础工程量增大较为明显,但其增加幅度小于水深增加幅度.即使在水深88m条件下,算例表明海上风机导管架基础在技术上是可行的,在经济上仍比目前的漂浮式基础具有优势.
Abstract
Seawater depth is one of the most important factors affecting the technical and economic feasibility of offshore wind turbine jacket foundations.To investigate the technical feasibility and economic adaptability of jacket foundations for offshore wind turbines at various seawater depths,an integrated turbine-jacket-pile foundation model was established using SACS software based on three engineering projects with varying water depths.The influence of seawater depth on the jacket foundation's modal characteristics,static and fatigue responses of the upper jacket structure,downward and uplift loads on the lower pile foundation,and material quantities are analyzed.The findings indicate that:(1)Seawater depth has minimal influence on the natural vibration characteristics of the jacket structure.(2)Under ultimate load condition,the most critical structural members are located in the lower tier of the jacket foundation,and in deep water,the design control condition may change from fatigue to ultimate load conditions.(3)Horizontal loads such as wind,waves,and currents become more prominent,increasing the load-bearing proportion of the upper jacket structure.(4)While material quantities increase significantly with water depth,the rate of increase is less than that of the water depth itself.Even at a depth of 88 meters,the case study indicates that the offshore wind turbine jacket foundation is technically feasible and retains an economic advantage over current floating foundations.
关键词
海上风电/深水导管架/海水深度/模态分析/疲劳分析Key words
offshore wind power/deepwater jacket foundation/seawater depth/modal analysis/fatigue analysis引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据