Title :
Low cycle fatigue life prediction of a 300MW steam turbine rotor using a new nonlinear accumulation approach
Author :
Sun, Yong-jian ; Hu, Li-Sheng
Author_Institution :
Dept. of Autom., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A new nonlinear model is proposed to assess the low cycle fatigue life of a steam turbine rotor. Temperature field and stress field of a 300MW steam turbine under normal sliding parameters stop is computed using Finite element analysis. For the reason considering the cyclic stress-strain relation , the new model shows a conservative character. The result is compared with that from the linear accumulation theory. The comparison shows that this new nonlinear model describes the damage accumulation more precisely and reasonably in engineering.
Keywords :
fatigue; finite element analysis; remaining life assessment; rotors; steam turbines; stress-strain relations; cyclic stress-strain relation; damage accumulation; finite element analysis; low-cycle fatigue life prediction; nonlinear accumulation approach; nonlinear model; normal-sliding parameter stop; power 300 MW; steam turbine rotor; stress field; temperature field; Entropy; Fatigue; Finite element methods; Rotors; Stress; Turbines; continuum damage mechanics; finite element analysis; low cycle fatigue; steam turbine rotor;
Conference_Titel :
Control and Decision Conference (CCDC), 2012 24th Chinese
Conference_Location :
Taiyuan
Print_ISBN :
978-1-4577-2073-4
DOI :
10.1109/CCDC.2012.6244625
