摘要
法兰盘是塔筒的重要部件,起到连接风机塔筒的作用。塔筒翻身吊装施工过程中,法兰盘及螺栓孔容易发生损伤变形,导致螺栓连接失效,严重影响塔筒的安全稳定性。因此,研究吊装条件下塔筒法兰盘的受力变形特征有着重要意义。采用有限元数值分析软件,对吊装条件下法兰盘及螺孔受力及变形特征进行分析研究,结果表明:塔筒吊装翻身过程中,当塔筒处于水平状态下法兰盘螺孔变形最大;法兰盘螺孔最大变形随法兰盘厚度增大而减小,随塔筒壁厚以及长度增大而增大。基于敏感性分析数据,提出了基于非线性拟合方法的法兰盘螺孔最大变形预测公式,平均误差仅为6.79%,可以为吊装条件下法兰盘螺孔最大变形预测提供有效的理论支持。
The flange is an important component to connect the tower cylinder of wind turbine.During the overturning lifting process of the tower cylinder,the flange and bolt holes are prone to damage and deformation,which will lead to bolt connection failure and severely impact the safety and stability of the tower cylinder.Therefore,the investigation on the deformation characteristics of flange during lifting conditions becomes crucial.The finite element numerical analysis software is used to analyze the stress and deformation characteristics of flange and bolt holes under lifting conditions.The research results show that,(a)during the overturning lifting process of tower cylinder,the deformation of bolt holes is maximum when the tower cylinder is in a horizontal state;and(b)the maximum deformation of bolt holes decreases with the increase of flange thickness,while increases with the increase of wall thickness and length of tower cylinder.Based on the sensitivity analysis,a prediction formula for the maximum deformation of bolt holes in the flange based on the nonlinear fitting method is proposed,and the average error of the proposed prediction formula is only 6.79%,which can provide effective theoretical support for the prediction of maximum deformation of bolt holes under lifting conditions.
作者
龚欢
卫红英
叶兆艺
王欣怡
李小鹏
GONG Huan;WEI Hongying;YE Zhaoyi;WANG Xinyi;LI Xiaopeng(PowerChina Huadong Engineering Corporation Limited,Hangzhou 311100,Zhejiang,China;Zhejiang East China Engineering Consulting Co.,Ltd.,Hangzhou 311100,Zhejiang,China;Institute of Port,Coastal and Offshore Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Xilinhot Taifu Wind Power Generation Co.,Ltd.,Xilinhot 026099,Inner Mongolia,China)
出处
《水力发电》
CAS
2024年第1期71-76,108,共7页
Water Power
基金
浙江省联合基金重点项目(LHZ22E090002)。
关键词
塔筒
翻身吊装施工
法兰盘
螺孔变形
数值分析
变形预测公式
tower cylinder
overturning lifting process
flange
bolt hole deformation
numerical analysis
deformation prediction formula
