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Technical Brief

Mitigation of Gear Mesh-Frequency Noise Using a Hydrostatic Bearing

[+] Author and Article Information
Zamir A. Zulkefli

Faculty of Engineering,
Mechanical and Manufacturing Engineering,
Universiti Putra Malaysia,
43400 UPM, Serdang,
Selangor, Malaysia
e-mail: zamirdin@upm.edu.my

Maurice L. Adams, Jr.

Case School of Engineering,
Mechanical and Aerospace Engineering,
Case Western Reserve University,
Cleveland, OH 44106-71222
e-mail: maurice.adams@case.edu

1Corresponding author.

Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received September 17, 2014; final manuscript received December 2, 2014; published online February 20, 2015. Assoc. Editor: Philippe Velex.

J. Vib. Acoust 137(3), 034502 (Jun 01, 2015) (4 pages) Paper No: VIB-14-1349; doi: 10.1115/1.4029613 History: Received September 17, 2014; Revised December 02, 2014; Online February 20, 2015

A proposed solution to reducing gear mesh-frequency vibrations in a gear-set involves the utilization of hydrostatic bearings placed in series, load wise, with the main support bearing. The hydrostatic bearings are expected to utilize its low pass filtering effect of the vibrational energies to prevent its transmission from the shaft to the gear housing where it would be emitted as noise. The present investigation examines the frequency response of a single-recess circular hydrostatic bearing under applied sinusoidal loads. The results show that as the driving frequency increases, the filtering effect of the hydrostatic bearing increases. The exhibited behavior is similar to the behavior of a low pass filter: negligible filtering effect at low frequencies, the filtering effect increasing from 0% to 90% over the midfrequencies range and the filtering effect remaining at the maximum value as the frequencies of the applied signals continue to increase. This observed behavior is expected to play a central role in the proposed gear mesh-frequency vibration mitigation system.

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References

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Figures

Grahic Jump Location
Fig. 1

Frequency response of the transmitted loads

Grahic Jump Location
Fig. 2

Normalized frequency response of the transmitted loads

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