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Development of a Set of Equations for Incorporating Disk Flexibility Effects in Rotordynamical Analyses PUBLIC ACCESS

[+] Author Affiliations
George T. Flowers

Auburn University, Auburn University, AL

Stephen G. Ryan

Marshall Space Flight Center, MSFC, AL

Paper No. 91-GT-075, pp. V005T14A008; 8 pages
doi:10.1115/91-GT-075
From:
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7902-3
  • Copyright © 1991 by ASME

abstract

Rotordynamical equations that account for disk flexibility are developed. These equations employ free – free rotor modes to model the rotor system. Only transverse vibrations of the disks are considered, with the shaft/disk system considered to be torsionally rigid. Second order elastic foreshortening effects that couple with the rotor speed to produce first order terms in the equations of motion are included. The approach developed in this study is readily adaptable for usage in many of the codes that are current used in rotordynamical simulations. The equations are similar to those used in standard rigid disk analyses but with additional terms that include the effects of disk flexibility. An example case is presented to demonstrate the use of the equations and to show the influence of disk flexibility on the rotordynamical behavior of a sample system.

Copyright © 1991 by ASME
Topics: Disks
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