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Analysis of Micro-Slip Properties for Models of Bladed Disc Friction Joints

[+] Author Affiliations
Junjie Chen, Chaoping Zang, Biao Zhou

Nanjing University of Aeronautics and Astronautics, Nanjing, China

E. P. Petrov

University of Sussex, Brighton, UK

Paper No. GT2017-64269, pp. V07BT35A021; 12 pages
doi:10.1115/GT2017-64269
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 7B: Structures and Dynamics
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5093-0
  • Copyright © 2017 by ASME

abstract

In the turbo-machinery structures with joints the contact pressures at contact interfaces are usually high enough to ensure that the contacting components stay joined and the gross slip does not occur. Nevertheless, the small relative slip over parts of the contact interface, i.e. the micro-slip, contributes significantly to the vibration damping. In the high-fidelity analysis of practical bladed discs the macro-slip model cannot provide sufficient accuracy for the predictive analysis of the properties of the friction damping in the contact interfaces. In this article, numerical studies of micro-slip damping effects is performed using 2D and 3D models of blade root joints. Analysis of hysteresis loops is performed to assess the influence of modelling parameters: choice of reference points, mesh configurations and other physical parameters. The impact of physical parameters, such as the contact geometry, friction coefficient, contact stiffness and tangential and normal loading, on the friction damping are numerically examined. The numerical results give a new insight in the micro-slip friction damping effects.

Copyright © 2017 by ASME
Topics: Friction , Disks

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