构架式风电塔塔柱法兰抗疲劳性能影响因素研究

Research on the influencing factors of fatigue resistance of lattice wind turbine tower column flange

以4.5MW机组、轮毂高度为160 m的构架式风电塔为例,基于ABAQUS有限元分析软件对塔柱法兰的抗疲劳性能进行参数化分析。阐述了构架式风电塔塔柱法兰抗疲劳性能影响因素,具体包括法兰板厚度、法兰倒角尺寸及塔柱预应力。分析结果表明,较大的法兰板厚度与适中的法兰倒角尺寸,可有效降低法兰节点各部位在疲劳荷载下的应力幅,提高法兰节点整体抗疲劳性能;塔柱预应力在提高法兰节点整体抗疲劳性能方面也能发挥有利作用。

This paper took a lattice wind turbine tower with a 4.5MW unit and hub height of 160 m as an example.Based on the ABAQUS finite element analysis software,the parametric analysis of the fatigue resistance of the tower column flange has been carried out.In this paper,the factors affecting the fatigue resistance of the tower column flanges of the lattice wind turbine towers were studied,including the thickness of the flange plate,the flange chamfer size and the tower column prestress.The analysis results show that larger flange plate thickness and moderate flange chamfer size can reduce the stress amplitude of each part of the flange joint under fatigue load effectively,and improve the overall fatigue resistance of the flange joint.Prestressing of tower column can also play a beneficial role in improving the overall fatigue resistance of flanged joints.