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140m高四边形构架式预应力抗疲劳风力发电塔过渡段结构设计
梁峰1,陶铎2
摘 要

(1 同济大学建筑设计研究院(集团)有限公司, 上海 200092; 2 同济大学建筑工程系,上海 200092)

[摘要]为解决我国风资源分布和市场电力需求之间的矛盾,风场布局将由三北地区向中东部低风速区转移。构架式预应力抗疲劳钢管风力发电塔是一种新型的组合式风塔,不仅具有用钢量省、施工方便等优点,还可通过在塔柱内布置预应力钢绞线有效提高风塔疲劳寿命。过渡段作为连接上部塔筒和下部塔架的转换结构,其结构性能对整塔的正常工作极其重要。介绍了某2-5MW轮毂高度为140m的四边形格构式预应力抗疲劳风力发电塔的过渡段结构设计,基于ABAQUS软件对过渡段进行极限承载力、抗疲劳性能和稳定性能的分析。分析结果表明,极限荷载工况下过渡段基本处于弹性阶段;过渡段厚度由45°方向的疲劳荷载工况控制,最大热点应力出现在过渡段斜锥面下部对接焊缝处;过渡段的稳定安全系数在3-0以上,满足设计要求。

[关键词]风力发电塔; 组合式风塔; 过渡段; 极限承载力; 抗疲劳性能; 稳定性能

中图分类号:TU347文献标识码:A文章编号:1002-848X(2019)14-0023-06

 

Structural design of transition piece of 140m-high quadrilateral lattice prestressed anti-fatigue wind turbine tower

Liang Feng1, Tao Duo2

(1 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China;2 Department of Building Engineering, Tongji University, Shanghai 200092, China)

Abstract:In order to solve the contradiction between the distribution of wind resources and the demand of market electricity, the distribution of wind field will be transferred from the north areas to the low wind speed areas in the middle and east of China. Lattice anti-fatigue prestressed steel pipe wind turbine tower is a new type of composite wind tower. It not only has the advantages of low steel consumption and convenient construction, but also can effectively improve the fatigue life of the wind tower by arranging prestressed steel strands in the tower column. Transition piece is a transfer structure connecting the upper tower barrel and the lower tower frame. Its structural performance is very important to the normal work of the whole tower. The structural design of transition piece of a quadrilateral lattice prestressed wind turbine tower with a height of 140m was introduced. The ultimate bearing capacity, anti-fatigue behavior and stability of the transition piece were analyzed based on ABAQUS software. The analysis results show that the transition piece is basically in the elastic stage under the ultimate load condition; the thickness of the transition piece is controlled by the fatigue load condition in the direction of 45 degrees, and the maximum hot spot stress occurs at the butt weld of the lower inclined cone of the transition piece; the stability safety factor of the transition section is above 3-0, which meets the design requirements.

Keywords:wind turbine tower; composite wind tower; transition piece; ultimate bearing capacity; anti-fatigue behavior; stability performance

 
作者简介:梁峰,博士,高级工程师,一级注册结构工程师,Email: 16034959@qq.com。
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