基于有限差分法的汽轮机转子低周疲劳计算  

Calculation for low cycle fatigue of steam turbine rotor based on finite difference method

作　　者：贺斌[1] 杨继明[1] 何健[1] 沈立业[1] 

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2012年第3期63-69,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50775015);湖南省教育厅科学研究重点资助项目(06A002)

摘　　要：根据火电机组运行的实际数据,介绍了有限差分法计算汽轮机转子低周疲劳损耗的原理.结合模拟机组冷态启动和停机过程,采用该方法计算了转子上两个特征点的温度变化曲线和应力变化曲线,再根据Miner线性累积法则得到了转子的低周疲劳寿命损耗.通过计算发现,该方法具有计算精度高、计算速度快和实时性强等优点,能够很好地满足工程实际问题的需要.Based on real operation data of the thermal power units,the principle that calculation for low cycle fatigue of steam turbine rotor based on finite difference method is introduced.Combination of the analog unit cold start and shutdown process,calculation for the temperature curve and the stress curve of the two feature points on the rotor with this method,and according to Miner＇s rule has been got the result of low cycle fatigue of steam turbine rotor.The method has high accuracy,the process of calculation is short,and it has a good real-time by calculation.So it can meet the needs of practical engineering problems well.

关 键 词：有限差分法 汽轮机 转子 低周疲劳 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]