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Safety Design Methods for Rotor-Bearing System and Dynamic Analysis in Aero-Engines

[+] Author Affiliations
Jie Hong, Tianrang Li, Zhichao Liang, Dayi Zhang, Yanhong Ma, Yongfeng Wang

Beihang University, Beijing, China

Paper No. GT2018-76065, pp. V07AT33A020; 9 pages
doi:10.1115/GT2018-76065
From:
  • ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
  • Volume 7A: Structures and Dynamics
  • Oslo, Norway, June 11–15, 2018
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5113-5
  • Copyright © 2018 by ASME

abstract

One typical fusing structure (fused device or load reduction device, a variable supporting stiffness structure used in bearing supporting in aero-engine design) was introduced in this paper. Based on the rotor-bearing system simulation model, a dynamic calculation under the condition of variable supporting stiffness was conducted aimed at providing data for the rotor system safety design. Results showed that: rotor working in supercritical state had a benefit to the dynamic characteristics, as when the supporting stiffness suddenly lost, transient excessively increasing vibration was restrained, steady vibration also remained at a low level. Transient response peak value and impact response increased with the increase of stiffness loss, steady vibration ratio decreased with the increase of stiffness loss. Therefore, a compromise on the choosing of an optimal stiffness loss value was necessary. We also got some other significant conclusions that are instructive for further engineering applications.

Copyright © 2018 by ASME

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