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Online life estimation for steam turbine rotor |
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| Authors: | Yong-Jian Sun Xiao-Qiang Liu Li-Sheng Hu Xue-Yan Tang |
| Institution: | 1. Dept. of Automation, Shanghai Jiao Tong University, 200240 Shanghai, China;2. Key Laboratory of System Control and Information Processing, Ministry of Education of China, 200240 Shanghai, China;3. Shanghai Turbine Company, Shanghai Electric Power Generation Group, 200240 Shanghai, China |
| Abstract: | Finite element analysis could achieve a near perfect result in computing the temperature field and stress field of steam turbine rotor in operation. This paper adopts the input and output data of finite element analysis under cold startup process to establish an online damage monitoring model of a steam turbine rotor. The sensitivity of thermal stress transfer function is analyzed using Nyquist plot. Comparison between finite element analysis model and this proposed model validates the accuracy of this work in assessing the low cycle fatigue damage. The present paper introduces a feasible online damage-monitoring methodology of steam turbine rotor in engineering. |
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