Numerous previous numerical studies have investigated the effect of surface texturing upon the static characteristics of journal bearings, including their load-carrying capacity and friction torque. In general, the dynamic characteristics of journal bearings are also important, since they are essential factors in predicting the vibration behavior of actual rotors supported by journal bearings. However, the effects of surface texture upon these dynamic characteristics have not been investigated through either numerical or experimental analysis. Thus, in the present study, such analyses were conducted to investigate the dynamic characteristics of textured journal bearings, such as their dynamic coefficients of oil film and the stability-threshold shaft speed supported by the bearings. Numerical analysis was done using a model that included inertial effects and energy loss; this model agreed well with experimental results concerning static characteristics from our previous study. Dynamic testing based on a sinusoidal-excitation method was also performed using textured journal bearings with uniform square dimples to verify the numerical results, which agreed qualitatively with those of experiment, confirming the validity of the numerical analysis. These results suggest that under the same operating conditions, the main effect of texturing upon the dynamic coefficients is to yield the cross-coupled stiffness coefficients with lower absolute values than the conventional ones with a smooth surface. The linear stability-threshold shaft speed of the rotor supported by the textured journal bearings became higher than that of a smooth bearing, mainly due to the reduction of cross-coupled stiffness coefficients. This tendency became more pronounced for high Reynolds number operating conditions and textured bearings with a large number of dimples.

References

References
1.
Etsion
,
I.
, and
Halperin
,
G.
,
2002
, “
A Laser Surface Textured Hydrostatic Mechanical Seal
,”
Tribol. Trans.
,
45
(
3
), pp.
430
434
.
2.
Ryk
,
G.
,
Kligerman
,
Y.
, and
Etsion
,
I.
,
2002
, “
Experimental Investigation of Laser Surface Texturing for Reciprocating Automotive Components
,”
Tribol. Trans.
,
45
(
4
), pp.
444
449
.
3.
Etsion
,
I.
,
Halperin
,
G.
,
Brizmer
,
V.
, and
Kligerman
,
Y.
,
2004
, “
Experimental Investigation of Laser Surface Textured Parallel Thrust Bearings
,”
Tribol. Lett.
,
17
(
2
), pp.
295
300
.
4.
Kligerman
,
Y.
, and
Etsion
,
I.
,
2001
, “
Analysis of the Hydrodynamic Effects in a Surface Textured Circumferential Gas Seal
,”
Tribol. Trans.
,
44
(
3
), pp.
472
478
.
5.
Raeymaekers
,
B.
,
Etsion
,
I.
, and
Talke
,
F. E.
,
2007
, “
A Model for Magnetic Tape/Guide Friction Reduction by Laser Surface Texturing
,”
Tribol. Lett.
,
28
(
1
), pp.
9
17
.
6.
Murthy
,
A. N.
,
Etsion
,
I.
, and
Talke
,
F. E.
,
2007
, “
Analysis of Surface Textured Air Bearing Sliders With Rarefaction Effects
,”
Tribol. Lett.
,
28
(
3
), pp.
251
261
.
7.
Nakano
,
M.
,
Korenaga
,
A.
,
Korenaga
,
A.
,
Miyake
,
K.
,
Murakami
,
T.
,
Ando
,
Y.
,
Usami
,
H.
, and
Sasaki
,
S.
,
2007
, “
Applying Micro-Texture to Cast Iron Surfaces to Reduce the Friction Coefficient Under Lubricated Conditions
,”
Tribol. Lett.
,
28
(
2
), pp.
131
137
.
8.
Kovalchenkoa
,
A.
,
Ajayi
,
O.
,
Erdemir
,
A.
,
Fenske
,
G.
, and
Etsion
,
I.
,
2005
, “
The Effect of Laser Surface Texturing on Transitions in Lubrication Regimes During Unidirectional Sliding Contact
,”
Tribol. Int.
,
38
(
3
), pp.
219
225
.
9.
Podgornik
,
B.
, and
Sedlacek
,
M.
,
2012
, “
Performance, Characterization and Design of Textured Surfaces
,”
ASME J. Tribol.
,
134
(
4
), p.
041701
.
10.
Kuroiwa
,
Y.
,
Amanov
,
A.
,
Tsuboi
,
R.
,
Sasaki
,
S.
, and
Kato
,
S.
,
2013
, “
Effectiveness of Surface Texturing for Improving the Anti-Seizure Property of Copper Alloy
,”
Procedia Eng.
,
68
, pp.
600
606
.
11.
Ausas
,
R.
,
Ragot
,
P.
,
Leiva
,
J.
,
Jai
,
M.
,
Bayada
,
G.
, and
Buscaglia
,
G. C.
,
2007
, “
The Impact of the Cavitation Model in the Analysis of Microtextured Lubricated Journal Bearings
,”
ASME J. Tribol.
,
129
(
4
), pp.
868
875
.
12.
Cupillard
,
S.
,
Cervantes
,
M.
, and
Glavatskih
,
S.
,
2008
, “
A CFD Study of a Finite Textured Journal Bearing
,”
IAHR 24th Symposium on Hydraulic Machinery and Systems
, Foz Do Iguasu, Brazil, Oct. 27–31, pp. 1–11.https://www.diva-portal.org/smash/get/diva2:1000576/FULLTEXT01.pdf
13.
Tala-Ighil
,
N.
,
Maspeyrot
,
P.
,
Fillon
,
M.
, and
Bounif
,
A.
,
2007
, “
Hydrodynamic Effects of Texture Geometries on Journal Bearing Surfaces
,”
International Conference on Tribology
, Bucharest, Romania, Nov. 8–10, pp.
47
52
.https://www.researchgate.net/publication/258516340_Hydrodynamic_effects_of_texture_geometries_on_journal_bearing_surfaces
14.
Tala-Ighil
,
N.
,
Fillon
,
M.
, and
Maspeyrot
,
P.
,
2011
, “
Effect of Textured Area on the Performances of a Hydrodynamic Journal Bearing
,”
Tribol. Int.
,
44
(
3
), pp.
211
219
.
15.
Brizmer
,
V.
, and
Kligerman
,
Y.
,
2012
, “
A Laser Surface Textured Journal Bearing
,”
ASME J. Tribol.
,
134
(
3
), p.
031702
.
16.
Kango
,
S.
,
Singh
,
D.
, and
Sharma
,
R. K.
,
2012
, “
Numerical Investigation on the Influence of Surface Texture on the Performance of Hydrodynamic Journal Bearing
,”
Meccanica
,
47
(
2
), pp.
469
482
.
17.
Kango
,
S.
,
Sharma
,
R. K.
, and
Pendey
,
R. K.
,
2014
, “
Comparative Analysis of Textured and Grooved Hydrodynamic Journal Bearing
,”
Proc. Inst. Mech. Eng., Part J
,
228
(
1
), pp.
82
95
.
18.
Mishra
,
S.
,
Choudhury
,
A.
, and
Sahu
,
S.
,
2014
, “
CFD Investigation of Influence of Reverse Textures on Bearing Surface of a Journal Bearings
,”
J. Appl. Fluid Mech.
,
7
(
3
), pp.
395
399
.http://jafmonline.net/JournalArchive/download?file_ID=34644&issue_ID=218
19.
Tala-Ighil
,
N.
, and
Fillon
,
M.
,
2015
, “
A Numerical Investigation of Both Thermal and Texturing Surface Effects on the Journal Bearings Static Characteristics
,”
Tribol. Int.
,
90
, pp.
228
239
.
20.
Meng
,
F. M.
,
Zhang
,
L.
,
Liu
,
Y.
, and
Li
,
T. T.
,
2015
, “
Effect of Compound Dimple on Tribological Performances of Journal Bearing
,”
Tribol. Int.
,
91
, pp.
99
110
.
21.
Yamada
,
H.
,
Taura
,
H.
, and
Kaneko
,
S.
,
2017
, “
Static Characteristics of Journal Bearings With Square Dimples
,”
ASME J. Tribol.
,
139
(
5
), p.
051703
.
22.
Frene
,
J.
,
Nicolas
,
D.
,
Degueurce
,
B.
,
Berthe
,
D.
, and
Godet
,
M.
,
1997
,
Hydrodynamic Lubrication: Bearings and Thrust Bearings
,
Elsevier
,
Amsterdam, The Netherlands
, pp.
138
238
.
23.
Dadouche
,
A.
,
Conlon
,
M. J.
,
Dmochowski
,
W.
,
Koszela
,
W.
,
Galda
,
L.
, and
Pawlus
,
P.
,
2011
, “
Effect of Surface Texturing on the Steady-State Properties and Dynamic Coefficients of a Plain Journal Bearing: Experimental Study
,”
ASME
Paper No. GT2011-46804.
24.
Dadouche
,
A.
, and
Conlon
,
M. J.
,
2013
, “
Reflections on Journal Bearings Performance With Surface Texturing
,”
Fifth World Tribology Congress
(
WTC
), Torino, Italy, Sept. 8–13, pp.
208
213
.http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=2dda476e-b48a-4490-8e8c-456791a87e7f
25.
Arghir
,
M.
,
Alsayed
,
A.
, and
Nicolas
,
D.
,
2002
, “
The Finite Volume Solution of the Reynolds Equation of Lubrication With Film Discontinuities
,”
Int. J. Mech. Sci.
,
44
(
10
), pp.
2119
2132
.
26.
Someya
,
T.
,
Mitsui
,
J.
,
Esaki
,
J.
,
Satio
,
S.
,
Kanemitsu
,
Y.
,
Iwatsubo
,
T.
,
Tanaka
,
M.
,
Hisa
,
S.
,
Fujikawa
,
T.
, and
Kanki
,
H.
,
1988
,
Journal-Bearing Databook
,
Springer-Verlag
,
Berlin
.
27.
Gasch
,
R.
, and
Pfützner
,
H.
,
1975
,
Rotordynamik Eine Einführung
,
Springer
,
Berlin
.
28.
Dimond
,
T. W.
,
Sheth
,
P. N.
,
Allaire
,
P. E.
, and
He
,
M.
,
2009
, “
Identification Methods and Test Results for Tilting Pad and Fixed Geometry Journal Bearing Dynamic Coefficients—A Review
,”
Shock Vib.
,
16
(
1
), pp.
13
43
.
29.
Flack
,
R. D.
,
Kostrzewsky
,
G. J.
, and
Taylor
,
D. V.
,
1993
, “
A Hydrodynamic Journal Bearing Test Rig With Dynamic Measurement Capabilities
,”
Tribol. Trans.
,
36
(
4
), pp.
497
512
.
30.
ANSI/ASME
,
1986
, “
Measurement Uncertainty—Part 1 [of] Instruments and Apparatus
,” American National Standards Institute/American Society of Mechanical Engineers, Washington, DC/New York, Standard No.
PTC 19.1-1985
.http://engineerradcc.library.link/portal/Measurement-uncertainty--part-1-of-Instruments/5JN3m6G0v9A/
You do not currently have access to this content.