基于损伤力学分析的汽轮机转子寿命损耗计算方法  

Life Expenditure Calculation Method for Steam Turbine RotorBased on Damage Mechanics Analysis

作　　者：王元良 廖燕清 彭家辉 徐鸿[1] 倪永中[1] WANG Yuanliang;LIAO Yanqing;PENG Jiahui;XU Hong;NI Yongzhong(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《动力工程学报》2024年第10期1525-1532,共8页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2022YFB4100403)。

摘　　要：在ANSYS有限元软件中使用耦合损伤的Chaboche黏塑性本构模型对1000 MW超超临界汽轮机转子在不同起动工况下的热机械力学响应进行了数值模拟。基于转子表面危险区域应力和损伤的分析结果,建立了汽轮机起动参数与转子最大损伤之间的函数关系,并以此提出了一种适用于复杂起动及升负荷工况下的转子寿命损耗计算方法。结果表明:在标准起动工况下模型计算结果与汽轮机寿命损耗分配表中的数据基本一致,验证了模型的有效性;采用所提方法后,对实际起动曲线进行简单处理,可快速计算出转子的寿命损耗率以及危险区域的热应力。Thermo-mechanical response of 1000 MW ultra-supercritical steam turbine rotor under different start-up conditions was numerically simulated by Chaboche viscoplastic constitutive model based on coupled damage in ANSYS finite element software.Based on analysis results of stress and damage in the dangerous area of rotor surface,the functional relationship between steam turbine start-up parameters and rotor maximum damage was established,and a rotor life expenditure calculation method for complex start-up and loading conditions was proposed.Results show that the calculation results of the model are basically consistent with the data in the turbine life expenditure distribution table under standard start-up conditions,verifying the validity of the model.When the proposed method was used,the life expenditure of the rotor and the thermal stress in dangerous area can be quickly calculated by simple processing actual start-up curves.

关 键 词：汽轮机转子 黏塑性本构模型 损伤力学 寿命预测 回归模型 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]