Modélisation de la rupture et de la reformation des films lubrifiants dans les contacts élastohydrodynamiques
Keywords:
Reynolds equation, finite element, elastohydrodynamic lubrication, cavitation, bearing, connecting rodAbstract
The presented algorithm allows accurate analysis of film breakdown and reforming during the working of actual devices. This algorithm includes ElastHydroDynamic formulation and is based on the JFO model and Finite Element discretization . It has been validated through a comparison with recent published studies. Active and non active film zones are determined for non stationary working conditions. Presented results finely show the shape of rupture boundaries. A sample of plots demonstrates the efficiency of the algorithms for solving the complex problem of big end connecting rod bearing EHD lubrication. The analysis of thickness, pressure and filling rate fields allows the optimisation of each bearing element size as well as the lubricant feeding device good working.
Downloads
References
[BOE 95] BOEDO S., BOOKER, J. F., « Cavitation in Normal Separation of Square and Circular
Plates », ASME Journal of Tribology, vol. 117, 1995, p. 403-410.
[BON 93] BONNEAU D., HUITRIC J., TOURNERIE B., « Finite Element Analysis of Grooved
Thrust Bearings and Grooved Gas Face Seals » ASME Journal of Tribology, vol. 115,
, p. 348-354.
[BON 94] BONNEAU D., ABSI J., « Analysis of Aerodynamic Journal Bearings with Small
Number of Herringbone Grooves by Finite Element Method » ASME Journal of
Tribology, vol. 116, 1994, p. 698-704.
[BON 95] BONNEAU D., GUINES D., FRENE J., TOPLOSKY J., « EHD Analysis, Including
Structural Inertia Effects and Mass-Conserving Cavitation Model » ASME Journal of
Tribology, vol. 117, 1995, p. 540-547.
[ELR 81] ELROD H.G., « A Cavitation Algorithm », ASME Journal of Lubrication
Technology, vol. 103, 1981, p. 350-354.
[JAC 57] JACOBSON B., FLOBERG L., « The finite Journal Bearing Considering
Vaporisation », Chalmers Tekniska Hoegskolas Hnndlingar, vol. 190, 1957, p. 1-116.
[KUM 91] KUMAR A., BOOKER J. F., « A Finite Element Cavitation Algorithm », ASME
Journal of Tribology, vol. 113, 1991, p. 276-286.
[MCI 88] MCIVOR J. D. C., FENNER D. N. , « An Evaluation of Eight-Node Quadrilateral
Elements for the Analysis of Dynamically Loaded Hydrodynamic Journal Bearing »,
Proc. Inst. Mech. Engrs, vol. 202, n° C2, 1988, p. 95-101.
[MUR 74] MURTY K.G., « Note on a Bard-Type Scheme for Solving the Complementarity
Problems », Opsearch, vol.11, 1974, p. 123-130.
[OLS 74] OLSSON K., « On Hydrodynamic Lubrication with Special Reference to
Nonstationary Cavitation », Chalmers University of Technology, Goteborg. 1974.
[OPT 00] OPTASANU V., BONNEAU D., « Finite Element Mass-Conserving Cavitation
Algorithm in Pure Squeeze Motion. Validation - Application to a Connecting-Rod Small
End Bearing, », ASME Journal of Tribology, vol. 122 , 1999, p. 162-169.
[ZIN 77] ZIENKIEWICZ O.C., The Finite Element Method, Mc Graw-Hill Book Co., London,
