针对应用于50 m水深海域的10 MW海上风力机,设计由三浮筒及三立柱组成的新型浮式基础,建立带有骨材结构的有限元分析模型。对于有关此新型浮式基础的设计波参数,一般选用随机性设计波的方法来确定,对波浪载荷工况下的整体结构。重点研究浮筒的骨材尺寸以及骨材间距对新型浮式基础强度的影响规律,并得到纵横骨材尺寸组合对新型浮式基础整体强度的影响规律。研究表明,新型浮式基础结构高应力区域位于3个浮筒连接处,浮筒板单元应力水平受骨材尺寸和骨材间距的共同影响,采用合适的尺寸间距组合可在应力水平相当的情况下显著降低用钢量。
Abstract
A new floating foundation composed of three pontoons and three columns was designed for a 10 MW offshore turbine in a water depth of 50 meters, and a finite element analysis model with stiffeners structure was established. The design wave parameters of new floating foundation were determined by random design wave method, and the strength of the overall structure under wave load condition was analyzed. The influence of the size and the spacing of the pontoons on the strength of new floating foundation of pontoon was studied, and the influence of longitudinal and transverse stiffeners size combination on the overall strength of new floating foundation was obtained. It is found that the high-stress area of the new floating structure is located at the connection of the three pontoons, and the stress level of the pontoon is affected by both the size and the spacing of the stiffeners.A appropriate size spacing combination can significantly reduce the steel consumption with comparable stress levels. This paper can provide a reference for the design of semi-submersible offshore wind turbine structures.
关键词
半潜式平台 /
海上风电 /
谱分析 /
设计波法 /
强度校核 /
骨材布置方案
Key words
semisubmersibles platform /
power wind power /
spectrum analysis /
design wave method /
strength check /
stiffeners arrangement scheme
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基金
国家自然科学基金（52171281）; 山东省重点研发计划项目（2020CXGC010702）; 中央高校基本科研业务费专项（202213032）
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