核电汽轮机转子日历总寿命的计算方法  

Calculation Method for Total Calendar Life of Steam Turbine Rotors for Nuclear Power Plant

作　　者：史进渊 谢岳生 江路毅 李汪繁 范雪飞 SHI Jinyuan;XIE Yuesheng;JIANG Luyi;LI Wangfan;FAN Xuefei(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《动力工程学报》2023年第9期1132-1142,共11页Journal of Chinese Society of Power Engineering

基　　金：国家电力投资集团有限公司统筹研发资助项目(TC2019HD10)。

摘　　要：提出了核电汽轮机转子在高周疲劳与低周疲劳损伤机理交互作用下日历总寿命的计算方法。介绍了核电汽轮机转子的高周疲劳损伤机理与高周疲劳裂纹萌生寿命计算方法以及低周疲劳损伤机理与低周疲劳裂纹萌生寿命计算方法。给出了核电汽轮机转子的高周疲劳裂纹扩展材料试验常数和高周疲劳裂纹扩展寿命计算方法以及低周疲劳裂纹扩展材料试验常数和低周疲劳裂纹扩展寿命计算方法。建立了核电汽轮机转子在高周疲劳与低周疲劳损伤机理交互作用下裂纹萌生日历寿命与裂纹扩展日历寿命的计算方法,以及核电汽轮机转子日历总寿命的计算方法,给出了核电汽轮机焊接低压转子日历总寿命计算与改进的应用实例。结果表明:某核电汽轮机焊接低压转子日历总寿命由原设计55.92 a增长到改进后的74.46 a,为核电汽轮机的长寿命设计提供了理论依据。Aimed at steam turbine rotors for nuclear power plant(NPP),a calculation method for the rotor total calendar life under the interaction of high-cycle fatigue and low-cycle fatigue damage mechanisms was proposed.The high-cycle fatigue damage mechanism and calculation method for the high-cycle fatigue crack initiation life,and the low-cycle fatigue damage mechanism and low-cycle fatigue crack initiation life of steam turbine rotors for NPP were introduced.Then,the methods for calculating its high-cycle fatigue crack propagation test constant and high-cycle fatigue crack propagation life,and for calculating its low-cycle fatigue crack propagation test constant and low-cycle fatigue crack propagation life were given.The calculation methods of crack initiation calendar life and crack propagation calendar life under the interaction of high-cycle fatigue and low-cycle fatigue damage mechanisms,and the calculation method for calendar total life of steam turbine rotors for NPP were established.An application example of the calculation and improvement of the total calendar life of a steam turbine low pressure welding rotor for NPP was given.Results show that the total calendar life of a steam turbine low pressure welding rotor for NPP is increased to 74.46 years by the improved design from 55.92 years of the original design,which provides a theoretical basis for the long life design of steam turbine for NPP.

关 键 词：核电汽轮机 转子 高周疲劳 低周疲劳 寿命设计 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]