0
TECHNICAL PAPERS

The Influence of Same-Sign Cross-Coupled Stiffness on Rotordynamics

[+] Author and Article Information
Bugra Ertas

 GE Global Research Center, Vibrations and Dynamics Lab, Rotating Equipment Group,1 Research Circle, Niskayuna, NY 12309ertas@research.ge.com

John Vance

 Texas A & M University, Mechanical Engineering Department, Turbomachinery Laboratory, College Station, TX 77843-3123jvance@tamu.edu

J. Vib. Acoust 129(1), 24-31 (Jun 03, 2006) (8 pages) doi:10.1115/1.2346690 History: Received October 26, 2005; Revised June 03, 2006

The following paper focuses on same-sign stiffness cross coupling from several viewpoints. First, the influence on rotordynamics is analyzed and discussed, followed by a discussion of how past experiments measuring cross-coupled forces on rotating components may have been in error due to an incomplete testing procedure. Finally, experimental tests are presented on a partitioned damper seal and the correct and complete experimental procedure for determining cross-coupled coefficients is described.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Force coefficients effects on flexible rotor: (a) flexible rotor, (b) rotor geometry, (c) rotor forces, and (d) destabilizing stiffness cross coupling

Grahic Jump Location
Figure 2

Same-sign stiffness cross-coupling coefficient forces: (a) −KXY and −KYX and (b) KXY and KYX

Grahic Jump Location
Figure 3

Same-sign CCS components

Grahic Jump Location
Figure 4

Orbit distortion from same-sign stiffness cross coupling: (a) radial distortion forces imposed on circular orbit and (b) distorted elliptical orbits

Grahic Jump Location
Figure 5

Benckert and Wachter’s test rig and experimental results (4)

Grahic Jump Location
Figure 6

(a) Labyrinth seal versus (b) six-bladed pocket damper seal

Grahic Jump Location
Figure 7

Static pressure measurements displacement pattern: 15,200rpm

Grahic Jump Location
Figure 8

Static pressure measurements

Grahic Jump Location
Figure 9

Negative direct stiffness effect in diverging seals: (a) centered rotor and (b) offset rotor-limiting case

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In