摘要
对于钢圆筒风电塔,塔筒外径较大,壁厚较小,塔筒抗屈曲能力对塔筒壁表面局部凹陷较敏感,国内外设计标准通常根据缺陷公差允许范围划分若干制造等级,再根据制造等级计算塔筒抗屈曲能力折减系数,保证在对应的制造公差范围内,塔筒具有足够的极限承载能力。但塔筒运输、吊装过程中,筒壁存在受碰撞的可能,使制造阶段产生的表面局部凹陷扩大或出现新的凹陷,造成塔筒极限承载能力下降。以轮毂高度为90m的钢圆筒风电塔受吊机碰撞为背景,基于ABAQUS有限元软件对塔筒极限承载能力进行参数化分析。研究了筒壁表面局部凹陷对塔筒极限承载能力的影响,并提出了一种针对凹陷的修复方法。结果表明:碰撞产生的筒壁凹陷会降低塔筒极限承载能力,降低幅度取决于凹陷深度和模式;筒壁碰撞凹陷经修复,塔筒极限承载能力可恢复。
For wind power single⁃tube steel tower,the outer diameter is larger,the wall thickness is smaller.The buckling resistance of the tube section is sensitive to the local uneven defects on the wall surface.The domestic and foreign design standards usually divide several manufacturing grades according to the allowable range of the defects tolerance,and then calculate the reduction factor of the buckling resistance of the tube section according to the manufacturing grade,so as to ensure that the tube section has sufficient ultimate bearing capacity within the corresponding manufacturing tolerance range.However,in the process of transportation and hoisting,there is a possibility that the tube wall may be collided,which expands the local surface uneven defects generated in the manufacturing stage or causes new defects,resulting in the decline of the ultimate bearing capacity of the tube section.A wind turbine tower which had been collided with hub height of 90m as an example,based on the ABAQUS finite element software,the parametric analysis of the ultimate bearing capacity of the tube section has been carried out.The influence of local uneven defects on the ultimate bearing capacity of the tube section was studied,and a reinforcement method for uneven defects was proposed.The results show that the concave convex defect on the wall caused by collision will reduce the ultimate bearing capacity of the tube section,and the extent of reduction depends on the depth and type of the uneven defect.After the repair of the wall uneven defect,the ultimate bearing capacity of the tube section can be restored.
作者
焦守雷
裘科一
彭文兵
JIAO Shoulei;QIU Keyi;PENG Wenbing(CRRC Shandong Wind Power Co.,Ltd.,Jinan 250022,China;Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China)
出处
《建筑结构》
北大核心
2025年第17期85-90,共6页
Building Structure
关键词
钢圆筒风电塔
筒壁凹陷
极限承载力
屈曲能力
参数化分析
wind power single⁃tube steel tower
uneven defects on cylinder wall
ultimate bearing capacity
buckling ability
parametric analysis
