某超超临界汽轮机转子蠕变-疲劳损伤分析及寿命评估  

Creep-fatigue Damage Analysis and Life Assessment for a Ultra-supercritical Stream Turbine Rotor

作　　者：金震杰 纪冬梅 吴凌轩 JIN Zhen-jie;JI Dong-mei;WU Ling-xuan(Department of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Electric Group Shanghai Electric Machinery Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海电力大学能源与机械工程学院,上海200090 [2]上海电气集团上海电机厂有限公司,上海200240

出　　处：《汽轮机技术》2022年第2期123-128,共6页Turbine Technology

基　　金：上海市自然科学基金(19ZR1420300)。

摘　　要：工业用电需求使得汽轮机组进行频繁的启停,针对此情况,建立某1000MW超超临界机组汽轮机高压转子的有限元模型,基于Norton定理模拟其冷态启动和额定工况下的正常运行过程,研究转子在启动及运行过程中的危险点位置、温度和应力的变化规律。根据模拟计算结果,采用CDM(Continuum damage mechanics)模型分析该转子在每年20次冷态启动工况下的疲劳损伤、蠕变损伤及考虑两者交互的蠕变-疲劳损伤,并将结果与美国ASME及法国RCC-MR和DDS标准进行对比,表明该汽轮机转子的寿命在ASME标准下为30年,而在法国RCC-MR和DDS标准下偏于不安全。Industrial demand for electricity leads to frequent start and stop of turbine units.In this case,a finite element model of high-pressure cylinder rotor of a 1000MW ultra-supercritical turbine was established.Based on Norton's theorem,the normal operation process under cold start-up and rated conditions was simulated,and the positions,change laws of temperature and stress of the dangerous points during start-up and operation were studied.Accordingto the simulation calculation results,the CDM(Continuum damage mechanics)model was adopted to analyze the fatigue damage,creep damage and the creep-fatigue interaction damage under the condition of cold-start 20 times per year,and the damage results were compared with American ASME and French RCC-MR and DDS standards.It was shown that the rotor life of the turbine rotor is 30 years under ASME standard,and the French RCC-MR and DDS standards tend to be unsafe.

关 键 词：汽轮机转子 冷态启动 蠕变-疲劳损伤 Norton定理 CDM(Continuum damage mechanics) 

分 类 号：TK265[动力工程及工程热物理—动力机械及工程]