A method of selecting master degrees of freedom (DOFs) for rotating substructure is presented in this paper to obtain reduced 3D rotor models. Fixed modes of the substructure below thrice the operating frequency are analyzed. According to each mode shape, the DOFs at where main kinetic energy locates are selected as master DOFs to decrease missing of dynamic coupling. Additional DOFs may be selected based on traditional substructure method. In the stationary reference frame, frequency-dependent gyroscopic effects can be included as damping matrices changing with spin speed. Besides, by selecting appropriate substructure, localized damping and key parts of the rotor for analysis can be kept the same as the original model. A reduced model of a high pressure rotor amply demonstrated the capability of the method in reducing the model size and increasing the computational efficiency with less than two percent error.
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ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
June 16–20, 2014
Düsseldorf, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4576-9
PROCEEDINGS PAPER
Method for Selecting Master Degrees of Freedom for Rotating Substructure Available to Purchase
Jianjun Wang,
Jianjun Wang
Beihang University, Beijing, China
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Xinyu Yao
Xinyu Yao
Beihang University, Beijing, China
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Yanfei Zuo
Beihang University, Beijing, China
Jianjun Wang
Beihang University, Beijing, China
Weimeng Ma
Beihang University, Beijing, China
Xue Zhai
Beihang University, Beijing, China
Xinyu Yao
Beihang University, Beijing, China
Paper No:
GT2014-25716, V07AT31A013; 6 pages
Published Online:
September 18, 2014
Citation
Zuo, Y, Wang, J, Ma, W, Zhai, X, & Yao, X. "Method for Selecting Master Degrees of Freedom for Rotating Substructure." Proceedings of the ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. Volume 7A: Structures and Dynamics. Düsseldorf, Germany. June 16–20, 2014. V07AT31A013. ASME. https://doi.org/10.1115/GT2014-25716
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