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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 310

A Fast Analytical Technique for Transient Elasto-Hydrodynamic Lubrication based on Acquisition of Contact Stiffness and Damping Distributions

S.C. Zhu1,2, D. Nelias2 and W.H. Zhang1

1State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, China
2Université de Lyon, INSA-Lyon, LaMCoS UMR CNRS 5259, Villeurbanne, France

Full Bibliographic Reference for this paper
S.C. Zhu, D. Nelias, W.H. Zhang, "A Fast Analytical Technique for Transient Elasto-Hydrodynamic Lubrication based on Acquisition of Contact Stiffness and Damping Distributions", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 310, 2016. doi:10.4203/ccp.110.310
Keywords: hydrodynamic lubrication, transient EHL problem, EHL stiffness distribution, EHL damping distribution.

Summary
In this paper, a new method is proposed to illustrate the transient elasto-hydrodynamically lubricated (EHL) problem. A steady-state solution of the EHL problem is obtained as the initial state of a dynamic load-increasing (or -decreasing) procedure. Based on the continuous acquisition of the EHL stiffness and damping distributions, dynamic mechanical behaviours of oil film are predicted, using a balance calculation of the load increment. Meanwhile, the availability of the EHL stiffness and damping distributions is in correctly proved by acquiring a nearly ideal transient EHL solution. This method can be efficiently used to analyse dynamic film contact for some engineering objects, such as bearing, gear and wheel-rail link (water film in rainy days), etc.

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