摘要
汽轮机转子等高溫设备在工作中常受到高低周复合疲劳栽荷的作用。本文在现有寿命模型基础上,提出了一种通过应变比-寿命比曲线预测高低周复合疲劳寿命的新方法,通过对三类不同材料的实验数据进行分析,表明了此方法具有一定的通用性。对寿命估算值与实验结果进行对比分析,估算值均在误差允许范围内,说明此方法可以较好地预测汽轮机转子钢的高低周复合疲劳寿命。
Steam turbine rotors and other high-temperature components are often subjected to high and low cycle composite fatigue loads effect during operation.It puts forward a new method with the curves of strain ratio(εHCF/εLCF)-life ratio(NLCF/HCF/NLCF)to predict the life of high and low cycle composite.The analysis of experimental data of three different materials shows that the method had certain versatility.The estimated values of life are within the error tolerance range by comparing the life estimation value with the experimental results,which indicates that the method can better predict the life of high and low cycle composite fatigue for steam turbine rotor steel.
作者
石红梅
侯伟
SHI Hong-mei;HOU Wei(School of Mechanical Electrical and Information Engineering,Shaanxi Energy Institute,Xianyang 712000,China;Xianyang Special Equipment Inspection Institute,Xianyang 712000,China)
关键词
汽轮机转子钢
高低周复合疲劳栽荷
寿命预测
Steam turbine rotor steel
high and low cycle composite fatigue load
service life prediction
