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On Double Frequency Vibration of a Generator-Bearing System With Asymmetrical Stiffness

[+] Author Affiliations
Senlin Huang, Zhansheng Liu, Jiexian Su

Harbin Institute of Technology, Harbin, P. R. China

Paper No. IMECE2002-39229, pp. 813-817; 5 pages
doi:10.1115/IMECE2002-39229
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Design Engineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Design Engineering Division
  • ISBN: 0-7918-3628-2 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

A finite element model for a generator-bearing system with asymmetrical stiffness is developed for investigation of the double frequency vibration. The modal reduction method is used for reducing the degrees of freedom system to improve computing efficiency, and the Newmark direct integration method is employed to solve the reduced motion equations. The two-modal interaction vibration is induced when the rotation speed is half a critical speed of the system due to asymmetry and gravity force of the generator. Such a phenomena is observed in the practical test.

Copyright © 2002 by ASME

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