摘要
风力发电可以高效地利用风能,同时具有建设时间短,风能储量多,装机规模灵活,相较于其他新能源的运行和维护成本低等优点,已成为风能的主要利用形式。随着风电产业的快速发展,高成本的大型兆瓦级风力发电机组在面对极端复杂的灾害时,需要有更高的安全性,所以研究分析大型风机法兰连接的工作状态具有一定的现实意义。因此,本文基于Petersen方法对风力发电机组塔筒M64大直径螺栓法兰进行拉伸试验,并使用高精度位移计和三维扫描仪记录所需数据,对其承载能力进行了分析研究,通过理论推导及有限元方法计算其荷载位移曲线并得到该模型极限破坏模式,同时通过比较法兰螺栓的实际刚度和等效刚度,在结构刚度计算时将其比值作为简化系数,从而提出一种法兰螺栓连接的抗拉刚度估算方法。
Wind power generation can use wind energy efficiently,and has the advantages of short construction time,large wind energy reserves,flexible installed capacity,low operation and maintenance cost compared with other new energy sources,so it has become the main form of wind energy utilization.With the rapid development of wind power industry,high-cost large-scale megawatt wind turbines need to have higher safety in the face of extremely complex disasters,so it is of practical significance to study and analyze the working state of large-scale wind turbine flange connection.Therefore,based on the Petersen method,this paper carries out the tensile test on the M64 large diameter bolt flange of the wind turbine tower,and uses the high-precision displacement meter and three-dimensional scanner to record the required data to analyze and study its bearing capacity.Through theoretical derivation and finite element method,the load displacement curve is calculated,and the ultimate failure mode of the model is obtained.At the same time,by comparing the actual siffness and equivalent siffness of flange bolts,the ratio is taken as the simplification factor in the calculation of structural siffness,thus a method for estimating the tensile stiffness of flange bolt connection is proposed.
作者
徐祉康
易伟同
祝磊
XU Zhikang;YI Weitong;ZHU Lei(Beijing Advanced Innovation Center for Future Urban Design,Beijing 100044,China;Beijing Higher Institution Research Center of Structural Engineering and New Materials,Beijing 100044,China;Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,Beijing 100044,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期1522-1527,共6页
Building Structure
