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- W2385067742 abstract "Combined rotor is the vital part of a gas turbine.It is important to reveal the performance degradation mechanism and assess the performance degradation characteristics of the combined rotor for making maintenance during operation.To reveal the performance degradation mechanism caused by structure degradation,the change rule of pretension force under time-history was obtained with consideration of the rod stress relaxation at high temperature.By defining the degradation degree of combined rotor with the pretension force of rod,degradation level of combined rotor system was evaluated.After calculating the contact stiffness of adjacent disks interface and analyzing the dynamic characteristics of combined rotor considering contact interface, the effect of different degradation level on dynamic characteristics of combined rotor was obtained.The result showed tht temperature was a sensitive parameter for combined rotor degradation,the drift of combined rotor natural frequency was caused by the relaxation of rod,and the relative reduction of the first three order natural frequency for combined rotor differed quite small,which had a linear relationship with degradation degree to some extent." @default.
- W2385067742 created "2016-06-24" @default.
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- W2385067742 date "2014-01-01" @default.
- W2385067742 modified "2023-09-23" @default.
- W2385067742 title "Effect of rod relaxation upon performance degradation of combined rotor for gas turbine" @default.
- W2385067742 hasPublicationYear "2014" @default.
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