摘要
塔筒作为大型风电机组的重要基础部件,其焊接部分的疲劳性能直接影响风电机组的安全可靠运行。提出了预测塔筒结构纵焊缝疲劳寿命的方法,在其满足极限强度的前提下,通过DIN18800-4截面应力计算获得各工况时序应力,结合雨流计数法和Miner线性累积损伤理论,预测塔筒纵焊缝疲劳寿命。结果表明:塔筒结构满足设计要求,验证了该方法的可行性和有效性。
The welding fatigue strength of the tower, which is an important part of large-scale wind turbines,can directly affect its running safety and reliability. A fatigue life prediction method of the tower＇s longitudinal welding is proposed in this paper. Under the precondition of satisfying the limit strength,time series stress at various operating conditions is obtained by DIN18800-4 stress calcula- tion,and the fatigue life of the tower＇s longitudinal welding is analyzed with the binding of the rain- flow counting method and the Miner linear cumulative damage theory. The results show that the tower structure satisfies the requirement of design. The feasibility and effectiveness of this method is verified.
出处
《内蒙古工业大学学报（自然科学版）》
2017年第2期137-142,共6页
Journal of Inner Mongolia University of Technology：Natural Science Edition
基金
内蒙古自然科学基金(2014MS0514)
内蒙古"草原英才"工程
关键词
风力机塔筒
纵焊缝
疲劳寿命预测
极限强度分析
Wind turbine tower
Longitudinal welding
Fatigue life prediction
Limit strength analysis
