风力发电机塔筒法兰高强度螺栓疲劳强度分析

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (2): 65-69.

风力发电机塔筒法兰高强度螺栓疲劳强度分析

梁原^1,2, 王有良^*2, 魏泰¹, 刘俭辉²

1.甘肃省特种设备检验检测研究院风电设备质检中心, 甘肃兰州 730050;
2.兰州理工大学机电工程学院, 甘肃兰州 730050

收稿日期:2021-10-13 出版日期:2023-04-28 发布日期:2023-05-05
通讯作者: 王有良(1986-),男,河南荥阳人,博士,副教授.Email:wangyouliang20@163.com
基金资助:
甘肃省科技计划项目(21JR7RA228,20JR10RA161),甘肃省高等学校青年博士基金(2021QB-048)

Fatigue strength analysis of high-strength bolts for tower flange of wind turbine

LIANG Yuan^1,2, WANG You-liang², WEI Tai¹, LIU Jian-hui²

1. Wind power Equipment Quality Inspection Center, Gansu Special Equipment Inspection and Testing Institute, Lanzhou 730050, China;
2. School of Mechanical and Electrical Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2021-10-13 Online:2023-04-28 Published:2023-05-05

摘要/Abstract

摘要： 以风力发电机塔筒法兰高强度螺栓为研究对象,考虑外载对疲劳损伤的影响,建立风力发电机塔筒法兰高强度螺栓疲劳强度分析的方法.首先,以连接截面受力状况作为损伤参量,借助塔筒等效模型确定最大受载截面;其次,采用Schmidt-Neuper算法获得塔筒任意扇面所受外载,并基于有限元模型研究外载与高强度螺栓内应力的关系,建立高强度螺栓疲劳损伤分布模型;最后,考虑预紧力的影响,对比研究不同螺栓预紧力疲劳累积损伤值,确定最优螺栓预紧力.结果表明,整圈法兰螺栓疲劳累积损伤最大位置为－4.17°和175.87°,预紧力比例为70%时螺栓预紧力最为合适.

关键词: 风力发电机, 高强度螺栓, 疲劳损伤, 有限元模拟, 预紧力

Abstract: An analysis method for high-strength bolts of wind turbine tower flange was established by considering the influence of external load on fatigue damage. Firstly, the maximum load section was determined with the aid of the tower equivalent model according to the damage parameters of the stress state on the connection section. Secondly, the external load on any sector of the tower was obtained by Schmidt-Neuper algorithm. Afterwards, the fatigue damage distribution model of high-strength bolts was established and the relationship between the external load and the internal stress of high-strength bolts was explored based on the finite element model. Finally, the optimal bolt pretightening force was determined with comparing the fatigue cumulative damage values with different bolt pretightening forces by considering the influence of pretightening forces. The results show that the positions of the maximum fatigue cumulative damage of flange bolts were －4.17° and 175.87°, and the bolt pretightening force was the most suitable value when the bolt pretightening force ratio was 70%.

Key words: wind turbine, high-strength bolt, fatigue damage, finite element simulation, pretightening force

中图分类号:

TK83

梁原, 王有良, 魏泰, 刘俭辉. 风力发电机塔筒法兰高强度螺栓疲劳强度分析[J]. 兰州理工大学学报, 2023, 49(2): 65-69.

LIANG Yuan, WANG You-liang, WEI Tai, LIU Jian-hui. Fatigue strength analysis of high-strength bolts for tower flange of wind turbine[J]. Journal of Lanzhou University of Technology, 2023, 49(2): 65-69.

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