https://cyberleninka.org/article/n/544115.pdf

Hydrodynamic lubrication of textured surfaces: A review of modeling techniques and key findings

Loads carrying capacity map for the surface texture design of SiC thrust bearing sliding in water

Effect of textured area on the performances of a hydrodynamic journal bearing

This study is aimed at examining and comparing several friction force models dealing with different friction phenomena in the context of multibody system dynamics. For this purpose, a comprehensive review of present literature in this field of investigation is first presented. In this process, the main aspects related to friction are discussed, with particular emphasis on the pure dry sliding friction, stick–slip effect, viscous friction and Stribeck effect. In a simple and general way, the friction force models can be classified into two main groups, namely the static friction approaches and the dynamic friction models. The former group mainly describes the steady-state behavior of friction force, while the latter allows capturing more properties by using extra state variables. In the present study, a total of 21 different friction force models are described and their fundamental physical and computational characteristics are discussed and compared in details. The application of those friction models in multibody system dynamic modeling and simulation is then investigated. Two multibody mechanical systems are utilized as demonstrative application examples with the purpose of illustrating the influence of the various frictional approaches on the dynamic response of the systems. From the results obtained, it can be stated that both the choice of the friction force model and friction parameters involved can significantly affect the simulated/modeled dynamic response of mechanical systems with friction.

A survey and comparison of several friction force models for dynamic analysis of multibody mechanical systems

A comprehensive survey of the analytical, numerical and experimental methodologies for dynamics of multibody mechanical systems with clearance or imperfect joints

Etude du probleme thermohydrodynamique theorique et experimental d'un palier de longueur finie, l'analyse tenant compte du transfert de chaleur entre le film, l'arbre, le manchon, la cavitation, la recirculation du lubrifiant etant prise en consideration. Mesure de la distribution de pression et de temperature le long de la paroi du palier ainsi que du rapport d'excentricite et du debit pour differentes vitesses et differentes charges. Bon accord entre resultats experimentaux et theoriques

A Study of the Thermohydrodynamic Performance of a Plain Journal Bearing Comparison Between Theory and Experiments

Part 1 Tribology from antiquity to our times: the prehistoric period the Greek and Roman period Middle Ages and Renaissance toward the Industrial Revolution the Industrial Revolution tribology in the 20th century. Part 2 Lubricating oils: base oil additive agents viscosity of lubricants viscosimetry viscosity variation with temperature viscosity variation with pressure lubricants specifications non-Newtonian behaviour of lubricants viscosity of gases. Part 3 General equations in hydrodynamic lubrication with a Newtonian fluid: generalized equations of the mechanics of viscous thin films physical interpretation energy equation in the mechanics of viscous thin films particular forms of the generalized equation of the mechanics of viscous thin films boundary conditions for smooth surfaces solving algorithms calculus of various parameters of the contact study of elementary loading cases applications remark on the Reynolds equation. Part 4 Plane sliders and thrust bearing pads: plane sliders with fixed geometry pad of finite dimensions thrust bearings with fixed geometry tilting pad thrust bearing global thermal effects theory-experiment comparisons. Part 5 Static characteristics of journal bearings: laminar journal bearings general considerations infinitely long journal bearing the short bearing finite journal bearing global thermal effect application to the design of a journal bearing theory-experiment comparison. Part 6 Dynamic characteristics of journal bearings: Reynolds equation in dynamic regime linear modelling - dynamic coefficients infinitely-short bearing infinitely-long bearing finite width bearing stability of journal bearing operation linear analysis theory-experiment comparison. Part 7 Non circular journal bearings with fixed geometry and with tilting pads: multiple-lobe bearing tilting pad journal bearing. Part 8 Journal bearings subjected to dynamic loading: rotor bearings study of connecting-rod bearings. Part 9 Influence of shape defects and of surface deformations: basic equations and general considerations shape defects linked to machining flaws shape defects generated by deformations under dynamic loading shape defects generated by instantaneous deformation in transitory regime. Part 10 Thermal effects in hydrodynamic journal bearings: basic equations numerical methods results theory - experiment comparison. Part 11 Superlaminar flow regimes: inertia forces in bearings in laminar regime Taylor's vortex regime in smooth bearings transition in thrust bearings turbulent flow comparison between theoretical results and experiments application to a turbine bearing thermal effects in non laminar regime. (Part contents)

Hydrodynamic Lubrication: Bearings and Thrust Bearings

Analysis of Thermal Effects in Hydrodynamic Bearings

The present work deals with the analysis of the incompressible laminar shear driven flow in a channel of which one of the walls carries a macro roughness pattern while the opposite one has a parallel velocity. The problem is discussed from the standpoint of lubrication theory and it is shown that the usual simplified models as the Reynolds or the Stokes equations are not applicable. Numerical results are presented for three types of two dimensional macro-roughness and two versions of a three dimensional one. It is shown that a pressure generation effect occurs with increasing the relative importance of convective inertia. Previous analyses found in the literature discussed only the increase of the shear stress due to the presence of the macro roughness but the lift effect due to the pressure generation has never been enlightened up to now. It is further discussed that, extrapolated to a very large number of macro roughness characterizing a textured surface, this new effect could be added to the other lift generating mechanisms of the lubrication theory. It could thus bring a different light on inertia effects stemming from the use of textured surfaces.

Theoretical Analysis of the Incompressible Laminar Flow in a Macro-Roughness Cell

Operating characteristics of four-shoe tilling-pad journal bearings of 100 mm diameter and 70 mm length are determined on an experimental device The load, between pad configuration, varies from 0 to 10,000 N and the rotational speed is up to 4000 rpm Forty thermocouples are used in order to measure bearing element temperatures (babbitt, shaft, housing and oil baths) The influence of operating conditions and preload ratio on bearing performances are studied

Jean Frene

Papers

A Study of the Thermohydrodynamic Performance of a Plain Journal Bearing Comparison Between Theory and Experiments

Hydrodynamic Lubrication: Bearings and Thrust Bearings

Analysis of Thermal Effects in Hydrodynamic Bearings

Theoretical Analysis of the Incompressible Laminar Flow in a Macro-Roughness Cell

Experimental Study of Tilting-Pad Journal Bearings—Comparison With Theoretical Thermoelastohydrodynamic Results