Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut

The aim of this paper is to investigate the effect of one axial groove at the inlet of full film bearing surface on dynamic coefficients and linear stability of rotor-bearing systems supported by two short journal bearings. The DuBois-Ocvirk short bearing approximation is applied to the governing Re...

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Main Authors: Hamdavi, S., Rao, T.V.V.L.N., Muhammad, M., Faez, K.M., Ya, H.H.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.19550 /
Published: Wiley-VCH Verlag 2017
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018681501&doi=10.1002%2fmawe.201600760&partnerID=40&md5=a6e45d2b196d8a11ad10313139caeb93
http://eprints.utp.edu.my/19550/
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spelling utp-eprints.195502018-04-20T07:05:17Z Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut Hamdavi, S. Rao, T.V.V.L.N. Muhammad, M. Faez, K.M. Ya, H.H. The aim of this paper is to investigate the effect of one axial groove at the inlet of full film bearing surface on dynamic coefficients and linear stability of rotor-bearing systems supported by two short journal bearings. The DuBois-Ocvirk short bearing approximation is applied to the governing Reynolds equation. The linearized nondimensional dynamic coefficients of stiffness and damping are calculated for both plain and grooved journal bearings. Moreover, using the linear stability analysis, the whirl frequency ratio and the threshold speed are obtained. Finally, results are presented for various eccentricity ratios, groove depth, and groove width a slenderness ratio of L/D=0.25. The results appeal that dynamic coefficients are mostly affected significantly at low eccentricity ratio regions. In sequence, one axial groove causes a remarkable deviation in the values of threshold speed and whirl frequency ratio. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Wiley-VCH Verlag 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018681501&doi=10.1002%2fmawe.201600760&partnerID=40&md5=a6e45d2b196d8a11ad10313139caeb93 Hamdavi, S. and Rao, T.V.V.L.N. and Muhammad, M. and Faez, K.M. and Ya, H.H. (2017) Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut. Materialwissenschaft und Werkstofftechnik, 48 (3). pp. 210-217. http://eprints.utp.edu.my/19550/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The aim of this paper is to investigate the effect of one axial groove at the inlet of full film bearing surface on dynamic coefficients and linear stability of rotor-bearing systems supported by two short journal bearings. The DuBois-Ocvirk short bearing approximation is applied to the governing Reynolds equation. The linearized nondimensional dynamic coefficients of stiffness and damping are calculated for both plain and grooved journal bearings. Moreover, using the linear stability analysis, the whirl frequency ratio and the threshold speed are obtained. Finally, results are presented for various eccentricity ratios, groove depth, and groove width a slenderness ratio of L/D=0.25. The results appeal that dynamic coefficients are mostly affected significantly at low eccentricity ratio regions. In sequence, one axial groove causes a remarkable deviation in the values of threshold speed and whirl frequency ratio. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
format Article
author Hamdavi, S.
Rao, T.V.V.L.N.
Muhammad, M.
Faez, K.M.
Ya, H.H.
spellingShingle Hamdavi, S.
Rao, T.V.V.L.N.
Muhammad, M.
Faez, K.M.
Ya, H.H.
Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
author_sort Hamdavi, S.
title Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
title_short Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
title_full Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
title_fullStr Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
title_full_unstemmed Linear stability analysis of short journal bearing with an axial groove: Lineare Stabilitätsanalyse von Kurzgleitlagern mit einer axialen Nut
title_sort linear stability analysis of short journal bearing with an axial groove: lineare stabilitätsanalyse von kurzgleitlagern mit einer axialen nut
publisher Wiley-VCH Verlag
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018681501&doi=10.1002%2fmawe.201600760&partnerID=40&md5=a6e45d2b196d8a11ad10313139caeb93
http://eprints.utp.edu.my/19550/
_version_ 1741196224952795136
score 11.62408

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