0
Journal of Engineering for Gas Turbines and Power | Volume 130 | Issue 3 | Research Paper
Research Papers: Gas Turbines: Structures and Dynamics

Nonlinear Dynamic Characterization of Oil-Free Wire Mesh Dampers

[+] Author and Article Information
Bugra H. Ertas

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

Huageng Luo

Noise and Vibration Group, Vibrations and Dynamics Laboratory, GE Global Research Center, Niskayuna, NY 12309luoh@crd.ge.com

J. Eng. Gas Turbines Power 130(3), 032503 (Apr 03, 2008) (8 pages) doi:10.1115/1.2836744 History: Received June 20, 2007; Revised October 07, 2007; Published April 03, 2008
Article
References
Figures
Tables
Citing Articles

The present work focuses on the dynamic characterization of oil-free wire mesh dampers. The research was aimed at determining nonlinear stiffness and damping coefficients while varying the excitation amplitude, excitation frequency, and static eccentricity. Force coefficients were extracted using a forced response method and also a transient vibration method. Due to the nonlinearity of the dampers, controlled amplitude single frequency excitation tests were required for the forced excitation method, whereas the transient response was analyzed using a Hilbert transform procedure. The experimental results showed that eccentricity has minimal influence on force coefficients, whereas increasing excitation amplitude and frequency yields decreasing stiffness and damping trends. In addition to the parameter identification tests, a rotating test was performed demonstrating high-speed damping capability of the oil-free wire mesh dampers to 40,000 rpm, which was also simulated using a nonlinear rotordynamic response to imbalance analysis.
FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
+Wire mesh dampers
View Large  |  Save Figure  |  Download Slide (.ppt)
Wire mesh dampers
Figure 1

Wire mesh dampers

Grahic Jump Location
+Nonrotating forced excitation test setup
View Large  |  Save Figure  |  Download Slide (.ppt)
Nonrotating forced excitation test setup
Figure 2

Nonrotating forced excitation test setup

Grahic Jump Location
+Example forced excitation impedance test: bearing support parameters
View Large  |  Save Figure  |  Download Slide (.ppt)
Example forced excitation impedance test: bearing support parameters
Figure 3

Example forced excitation impedance test: bearing support parameters

Grahic Jump Location
+Direct stiffness and damping results for two wire mesh dampers: forced excitation tests
View Large  |  Save Figure  |  Download Slide (.ppt)
Direct stiffness and damping results for two wire mesh dampers: forced excitation tests
Figure 4

Direct stiffness and damping results for two wire mesh dampers: forced excitation tests

Grahic Jump Location
+Al-Khateeb’s stick-slip model (8)
View Large  |  Save Figure  |  Download Slide (.ppt)
Al-Khateeb’s stick-slip model (8)
Figure 5

Al-Khateeb’s stick-slip model (8)

Grahic Jump Location
+Transient impact hammer test setup and test matrix
View Large  |  Save Figure  |  Download Slide (.ppt)
Transient impact hammer test setup and test matrix
Figure 6

Transient impact hammer test setup and test matrix

Grahic Jump Location
+(a) An impulse response and its Fourier spectrum and (b) raw impulse response and cleaned mode
View Large  |  Save Figure  |  Download Slide (.ppt)
(a) An impulse response and its Fourier spectrum and (b) raw impulse response and cleaned mode
Figure 7

(a) An impulse response and its Fourier spectrum and (b) raw impulse response and cleaned mode

Grahic Jump Location
+Identification results
View Large  |  Save Figure  |  Download Slide (.ppt)
Identification results
Figure 8

Identification results

Grahic Jump Location
+Amplitude dependency of the damper characteristics
View Large  |  Save Figure  |  Download Slide (.ppt)
Amplitude dependency of the damper characteristics
Figure 9

Amplitude dependency of the damper characteristics

Grahic Jump Location
+Rotordynamic model: long rotor configuration
View Large  |  Save Figure  |  Download Slide (.ppt)
Rotordynamic model: long rotor configuration
Figure 10

Rotordynamic model: long rotor configuration

Grahic Jump Location
+Predicted rotordynamics: long rotor with integral wire mesh dampers
View Large  |  Save Figure  |  Download Slide (.ppt)
Predicted rotordynamics: long rotor with integral wire mesh dampers
Figure 11

Predicted rotordynamics: long rotor with integral wire mesh dampers

Grahic Jump Location
+Measured rotordynamics: fixed end synchronous response to imbalance
View Large  |  Save Figure  |  Download Slide (.ppt)
Measured rotordynamics: fixed end synchronous response to imbalance
Figure 12

Measured rotordynamics: fixed end synchronous response to imbalance

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
Supporting Systems/Foundations
Handbook on Stiffness & Damping in Mechanical Design> Chapter 5
Engineering Design about Electro-Hydraulic Intelligent Control System of Multi Axle Vehicle Suspension
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)
Stiffness and Damping of Power Transmission Systems and Drives
Handbook on Stiffness & Damping in Mechanical Design> Chapter 6
Contact (Joint) Stiffness and Damping
Handbook on Stiffness & Damping in Mechanical Design> Chapter 4
Pipe Vibration Testing and Analysis
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 2, Third Edition> Chapter 37
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