摘要
随着风力发电机组塔架向着越来越高的方向发展,格构式钢塔架因其有着结构刚度大、运输方便、基础造价低的优势,得到了越来越多的研究。在格构式塔架设计过程中,与机舱相连的过渡钢筒段为最重要的设计环节之一。本文以某低风速风场的120m四边形全格构塔架设计为例,基于ANSYS有限元分析软件对全格构塔架顶部与机舱相连过渡段的受力性能进行分析,包括极限工况和疲劳工况的分析。分析结果表明,极限工况下过渡段钢筒壁厚在22mm~28mm范围内变化时,塑性总应变均小于1.0%;疲劳工况下,环向焊缝和竖向焊缝的损伤均较小。
With the need of building higher wind turbines,lattice towers are being studied more and more for the advantages of structural rigidity,easy transportation,and low foundation cost.In the design process of lattice tower,the transition piece,which connected the nacelle with the lattice tower,is one of the most important design aspects.In this paper,the transition piece of a lattice tower with the hub height of 120m was introduced.The static and fatigue behavior of the composite tower were examined based on ANSYS.The results showed that the total plastic strain was less than 1.0%when the wall thickness of the transitional piece varied from 22mm to 28 mm under the static load limit condition;under the fatigue load limit condition,the cumulative fatigue damage of both the annular and vertical welds was relatively small.
作者
彭文兵
Peng Wenbing(The Architectural Design and Research Institute of Tongji University,Shanghai 200092,China)
出处
《特种结构》
2021年第4期85-88,共4页
Special Structures
关键词
格构式塔架
过渡段
疲劳强度
塑性总应变
Lattice tower
Transition piece
Fatigue strength
Total plastic strain
