Title :
Low cycle fatigue life prediction of steam turbine rotor based on a new CDM model
Author :
Yongjian Sun ; Lisheng Hu
Author_Institution :
Dept. of Autom., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
Low cycle fatigue life of a steam turbine rotor is predicted using a new CDM model. A simulation experiment is made to compute the damage accumulation of a 300MW steam turbine rotor under cold start. Adopting the cyclic stress-strain relation, this new continuum damage mechanics model exhibits a conservative character. Comparison with result of the linear accumulation theory and practical test data indicates that present new nonlinear CDM model describes the damage accumulation more precisely and reasonably in engineering.
Keywords :
continuum mechanics; fatigue; reliability; rotors; rotors (mechanical); steam turbines; stress-strain relations; CDM model; cold start; continuum damage mechanics model; cyclic stress-strain relation; damage accumulation; linear accumulation theory; low cycle fatigue life prediction; power 300 MW; steam turbine rotor; Computational modeling; Data models; Fatigue; Mathematical model; Rotors; Stress; Turbines; continuum damage mechanics; finite element analysis; low cycle fatigue; steam turbine;
Conference_Titel :
Control Conference (CCC), 2014 33rd Chinese
Conference_Location :
Nanjing
DOI :
10.1109/ChiCC.2014.6896122
