Detailed formulations are presented for a mass-conserving, mode-based computational model which includes effects of structural inertia and surface roughness. Performance evaluation of a big end connecting rod hearing is shown to require only a few mode shapes, from which it is found that body forces arising from structural motion strongly influence film thickness history at operating engine speeds. Surface roughness effects on nominal film thickness are found to be small, even in assumed regions of partial lubrication.

Issue Section:
Research Papers
Topics:
Elastohydrodynamic lubrication, Inertia (Mechanics), Surface roughness, Film thickness, Engines, Lubrication, Mode shapes, Performance evaluation
1.
Boedo, S., 1995, “A Mass-Conserving Modal-Based Elastohydrodynamic Lubrication Model: Effects of Structural Body Forces, Surface Roughness, and Mode Stiffness Variation,” Ph.D. thesis, Cornell University, Ithaca, N.Y.
2.
Boedo, S., and Booker, J. F., 1995, “Body Force and Surface Roughness Effects in a Mass-Conserving Mode-based Elastohydrodynamic Lubrication Model,” Proc. 1995 International Tribology Conference, Yokohama, Japan, in press.
3.
Boedo, S., Booker, J. F., and Wilkie, M. J., 1995, “A Mass Conserving Modal Analysis for Elastohydrodynamic Lubrication,” Proc. 21st Leeds-Lyon Symposium on Tribology, Lubricants and Lubrication, D. Dowson, C. M. Taylor, T. H. C. Childs, and G. Dalmaz, eds., Elsevier, pp. 513–523.
4.
Bonneau
D.
,
Guines
D.
,
Freˆne
J.
, and
Toplosky
J.
,
1995
, “
EHD Analysis, Including Structural Inertia Effects and a Mass-Conserving Cavitation Model
,”
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117
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540
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547
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5.
Booker
J. F.
,
1989
, “
Basic Equations for Fluid Films with Variable Properties
,”
ASME JOURNAL OF TRIBOLOGY
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111
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.
1.
Booker
J. F.
, and
Huebner
K. H.
,
1972
, “
Application of Finite Element Methods to Lubrication: An Engineering Approach
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
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, p.
313
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2.
Errata
:
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
98
, Jan
1976
, p.
39
39
.
1.
Brewe
D. E.
,
1986
, “
Theoretical Modeling of Vapor Cavitation in Dynamically Loaded Journal Bearings
,”
ASME JOURNAL OF TRIBOLOGY
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108
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2.
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3.
Jones, G. J., 1983, “Crankshaft Bearings: Oil Film History,” Proc. 9th Leeds-Lyon Symposium on Tribology, Leeds, England, Tribology of Reciprocating Engines, D. Dowson, C. M. Taylor, M. Godet, and D. Berthe, eds., Butterworths, pp. 83–88.
4.
Knoll
G.
,
Lang
J.
, and
Riena¨cker
A.
,
1996
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Transient EHD Connecting Rod Analysis: Full Dynamic Versus Quasi-Static Deformation
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
118
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349
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355
.
5.
Kumar
A.
, and
Booker
J. F.
,
1991
, “
A Finite Element Cavitation Algorithm
,”
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.
6.
Kumar
A.
,
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P. K.
, and
Booker
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,
1990
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Modal Analysis of Elastohydrodynamic Lubrication: A Connecting Rod Application
,”
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.
7.
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, and
Booker
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,
1985
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Dynamically Loaded Journal Bearings: A Finite Element Treatment for Rigid and Elastic Surfaces
,”
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515
.
8.
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J. D. C.
, and
Fenner
D. N.
,
1989
, “
Finite Element Analysis of Dynamically Loaded Flexible Journal Bearings: A Fast Newton-Raphson Method
,”
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, Vol.
111
, pp.
597
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604
.
9.
Oh
K. P.
, and
Goenka
P. K.
,
1985
, “
The Elastohydrodynamic Solution of a Journal Bearing under Dynamic Loading
,”
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395
.
10.
Olson, E. G., 1995, “A Finite Element Treatment of Hydrodynamic Lubrication with Structural Inertia and Elasticity,” Ph.D. thesis, Cornell University, Ithaca, NY.
11.
Paranjpe
R. S.
, and
Goenka
P. K.
,
1990
, “
Analysis of Crankshaft Bearings using a Mass Conserving Algorithm
,”
STLE Tribology Transactions
, Vol.
33
, pp.
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344
.
12.
Patir
N.
, and
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H. S.
,
1978
, “
An Average Flow Model for Determining Effects of Three Dimensional Roughness on Partial Hydrodynamic Lubrication
,”
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12
.
13.
Vijayaraghavan
D.
, and
Keith
T. G.
,
1990
, “
An Efficient, Robust, and Time Accurate Numerical Scheme Applied to a Cavitation Algorithm
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
112
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51
.
14.
Wilkie, M. J., 1991, “Generation of Modeshapes for Use in Modal Elastohydrodynamic Bearing Analysis,” Master of Engineering Design Project, Cornell University, Ithaca, NY, Dec., 1991.
15.
Zhu
D.
, and
Cheng
H. S.
,
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, “
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,”
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.
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