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Technical Brief

Modally Tuned Influence Coefficients for Low-Speed Balancing of Flexible Rotors

[+] Author and Article Information
Y. A. Khulief

Department of Mechanical Engineering,
King Fahd University of Petroleum & Minerals,
KFUPM Box 1767,
Dhahran 31261, Saudi Arabia
e-mail: khulief@kfupm.edu.sa

Wasiu Oke

Department of Mechanical Engineering,
King Fahd University of Petroleum & Minerals,
KFUPM Box 1767,
Dhahran 31261, Saudi Arabia
e-mail: wasiuad@kfupm.edu.sa

M. A. Mohiuddin

Data & Consulting Services,
Schlumberger Dhahran Tech Valley,
Dhahran 31261, Saudi Arabia
e-mail: MMohiuddin2@slb.com

1Corresponding author.

Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received August 2, 2012; final manuscript received October 21, 2013; published online December 18, 2013. Assoc. Editor: Yukio Ishida.

J. Vib. Acoust 136(2), 024501 (Dec 18, 2013) (5 pages) Paper No: VIB-12-1220; doi: 10.1115/1.4025995 History: Received August 02, 2012; Revised October 21, 2013

The need to devise a low-speed balancing method for balancing high-speed rotors was recognized and addressed. In this paper, a scheme that combines both the influence coefficients and modal balancing techniques is presented. The scheme is developed for low-speed balancing of high-speed rotors, and relies on knowledge of the modal characteristics of the rotor. The conditions for applicability of the method were stated in the light of the experientially estimated rotor deflection mode shapes. An experimental test rig of a flexible rotor was constructed to verify the applicability and reliability of the low-speed balancing scheme.

FIGURES IN THIS ARTICLE
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Copyright © 2014 by ASME
Topics: Rotors
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References

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Tan, S. G., and WangX. X., 1993, “A Theoretical Introduction to Low Speed Balancing of Flexible Rotors: Unification and Development of the Modal Balancing and Influence Coefficient Techniques,” J. Sound Vibr., 168(3), pp. 385–394. [CrossRef]
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Figures

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Fig. 1

The instrumented test rig

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Fig. 2

The simulated rotor response

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Fig. 3

The rotor response at 600 rpm

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Fig. 4

The rotor running at 2500 rpm

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Fig. 5

The rotor running at 2500 rpm (after low-speed balancing at 600 rpm)

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Fig. 7

The rotor running at 7200 rpm (70.6 reduction after low-speed balancing at 600 rpm)

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Fig. 6

The rotor running at 7200 rpm

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