论文部分内容阅读
为了弥补门洞对塔筒的削弱,目前单管风力发电塔塔筒门洞处多采用环形加劲板门框进行补强,并增大门洞处塔筒壁厚度,这使得塔筒重量、焊接量及应力集中程度均增大。本文提出了一种无需增大门洞处筒壁厚度的新型厚度渐变型塔筒门框,并从极限强度、疲劳强度、自振特性及经济性等四个方面对采用新型门框进行补强的单管风力发电塔进行了分析,研究了新型门框的补强效果。分析结果表明,厚度渐变型塔筒门框极限强度及疲劳强度均满足要求,且对风力发电塔的一阶自振频率几乎没有影响;相比环形加劲板门框而言,采用厚度渐变型塔筒门框可以为整个塔架节省约2.1%的用钢量。
In order to compensate for the weakening of the tower, the current use of annular stiffener door frame at the single-tube wind turbine towers to reinforce and increase the thickness of the tower wall at the opening, which makes the tower weight, welding volume and stress concentration The degree of increase. In this paper, we propose a new type of tapered pipe frame without increasing the thickness of the wall at the door, and from the four aspects of the ultimate strength, fatigue strength, natural vibration characteristics and economy of the new door frame reinforcement The wind power tower was analyzed and the reinforcement effect of the new door frame was studied. The analysis results show that the ultimate strength and fatigue strength of the tapered tower frame meet the requirements, and have little effect on the first-order natural frequency of wind power tower. Compared with the ring stiffener, It can save about 2.1% of the total amount of steel for the entire tower.