汽轮机转子钢高温蠕变疲劳寿命预测方法
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摘要
随着越来越多的新能源发电并网,现代火力电厂被赋予调峰的职责。调峰过程中汽轮机组的频繁启停,加剧了汽轮机转子的蠕变疲劳损伤。文中以汽轮机转子钢为例,综述了汽轮机转子在低周蠕变疲劳和复合高周疲劳载荷下的寿命预测方法,为汽轮机组的设计优化,寿命预测及安全监控等方面提供了理论基础。
To adjust the oscillation of renewable energy sources in the discontinuous generation of electricity,power plants will be used to stabilize the fluctuations. Power plants will start and stop frequently in the fluctuations,which exacerbated the fatigue creep damage of turbine rotor material. In this paper,the prediction methods for fatigue creep life of turbine rotor under low cycle fatigue and high cycle fatigue load have been summarized,which provides a theoretical basis for optimizing the design,predicting the life of fatigue creep and monitoring of the power plant components.
To adjust the oscillation of renewable energy sources in the discontinuous generation of electricity,power plants will be used to stabilize the fluctuations. Power plants will start and stop frequently in the fluctuations,which exacerbated the fatigue creep damage of turbine rotor material. In this paper,the prediction methods for fatigue creep life of turbine rotor under low cycle fatigue and high cycle fatigue load have been summarized,which provides a theoretical basis for optimizing the design,predicting the life of fatigue creep and monitoring of the power plant components.
引文
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[12]Mario Metzger,Britta Nieweg,Christoph Schweizer,et al.Lifetime prediction of cast iron materials under combined thermomechanical fatigue and high cycle fatigue loading using amechanism-based model[J].International Journal of Fatigue,2013,53:58-66.
[13]Beck T,Loehe D,Luft J,Henne I.Damage mechanisms of cast Al-Si-Mg alloysunder superimposed thermal-mechanical fatigue and high-cycle fatigueloading.Mater Sci Eng A 2007;468-470:184-92.
[14]Beck T,Henne I,Loehe D.Lifetime of cast Al Si6Cu4under superimposedthermal-mechanical fatigue and high-cycle fatigue loading.Mater Sci Eng A2008;483-484:382-6.
[15]赵振华,陈伟,吴铁鹰.高低周复合载荷下的钛合金疲劳寿命估算[J].机械强度,2011,33(4):629-632.
[2]田丰.汽轮机设备及系统[M].北京:中国电力出版社,2010.
[3]康宁,严晓君,李晓甫,等.高低周复合疲劳试验中振动应力的监测与计算[J].燃气涡轮实验与研究,2010,23(4):22-25.
[4]周新灵,田宇,李海霞,等.超超临界汽轮机高中压转子钢高温低周疲劳性能研究[A].学术交流,2013,7:51-52.
[5]Andre Pineau,Stephen D,Antolovich.High temperature fatigue of nickel-base superalloys-A review with special emphasis on deformation modes and oxidation[J].Engineering Fatigue Analysis,2009,16:2668-2697.
[6]Manson SS,Halford GR.Relation of cyclic loading pattern to microstructural fracture in creep-fatigue[C],Proc.Of Fatigue 1984,The sec.Int.Conf.on Fatigue and Fatigue Thresholds,Vol.III,1984,1237-1255.
[7]胡绪腾,宋迎东.总应变-应变能区分法[J].机械工程学报,2007,43(2):219-224.
[8]何晋瑞.金属高温疲劳研究与发展[R].北京:北京621所.
[9]Ostergren WJ.A damage function and associated failure equation for predicting hold time and frequency effects in elevated temperature low cycle fatigue.Journal of Testing Evaluation,1976,4:327-339.
[10]Priest R,Ellison E.A combined deformation map ductility exhaustion approach to creep-fatigue analysis[J].Mater Sci Eng1981,49:7-17.
[11]C.Schweizer,T.Seifert,B.Nieweg,et al.Mechanisms and modelling of fatigue crack growthunder combined low and high cycle fatigue loading[J].International Journal of Fatigue,2011,33:194-202.
[12]Mario Metzger,Britta Nieweg,Christoph Schweizer,et al.Lifetime prediction of cast iron materials under combined thermomechanical fatigue and high cycle fatigue loading using amechanism-based model[J].International Journal of Fatigue,2013,53:58-66.
[13]Beck T,Loehe D,Luft J,Henne I.Damage mechanisms of cast Al-Si-Mg alloysunder superimposed thermal-mechanical fatigue and high-cycle fatigueloading.Mater Sci Eng A 2007;468-470:184-92.
[14]Beck T,Henne I,Loehe D.Lifetime of cast Al Si6Cu4under superimposedthermal-mechanical fatigue and high-cycle fatigue loading.Mater Sci Eng A2008;483-484:382-6.
[15]赵振华,陈伟,吴铁鹰.高低周复合载荷下的钛合金疲劳寿命估算[J].机械强度,2011,33(4):629-632.