Elastohydrodynamic analysis and Pareto optimization of intact, worn and misaligned journal bearings

Nikolakopoulos, PG; Papadopoulos, CI; Kaiktsis, L

dc.contributor.author	Nikolakopoulos, PG	en
dc.contributor.author	Papadopoulos, CI	en
dc.contributor.author	Kaiktsis, L	en
dc.date.accessioned	2014-03-01T02:47:20Z
dc.date.available	2014-03-01T02:47:20Z
dc.date.issued	2011	en
dc.identifier.issn	0025-6455	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33090
dc.subject	EHD lubrication	en
dc.subject	Journal bearings	en
dc.subject	Misalignment	en
dc.subject	Pareto optimization	en
dc.subject	Wear	en
dc.subject.classification	Mechanics	en
dc.subject.other	Bearing deformation	en
dc.subject.other	Coupled problems	en
dc.subject.other	Design variables	en
dc.subject.other	Elastohydrodynamic analysis	en
dc.subject.other	Fault conditions	en
dc.subject.other	Finite element formulations	en
dc.subject.other	Friction coefficients	en
dc.subject.other	Hydrodynamic lubrication	en
dc.subject.other	Independent variables	en
dc.subject.other	Iterative algorithm	en
dc.subject.other	Length to diameter ratio	en
dc.subject.other	Maximum pressure	en
dc.subject.other	Misalignment	en
dc.subject.other	Multi-objective optimization problem	en
dc.subject.other	Optimal solutions	en
dc.subject.other	Parameter spaces	en
dc.subject.other	Pareto dominance	en
dc.subject.other	Pareto optimization	en
dc.subject.other	Sommerfeld number	en
dc.subject.other	Algorithms	en
dc.subject.other	Bearing pads	en
dc.subject.other	Deformation	en
dc.subject.other	Elastohydrodynamic lubrication	en
dc.subject.other	Elastohydrodynamics	en
dc.subject.other	Friction	en
dc.subject.other	Journal bearings	en
dc.subject.other	Pareto principle	en
dc.subject.other	Multiobjective optimization	en
dc.title	Elastohydrodynamic analysis and Pareto optimization of intact, worn and misaligned journal bearings	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1007/s11012-010-9319-7	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11012-010-9319-7	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	In this paper, we propose an engineering approach for the elastohydrodynamic (EHD) analysis and optimization of the steady operation of intact, worn or/and misaligned journal bearings. We develop an iterative algorithm, based on finite element formulations for both the hydrodynamic lubrication and the elastic deformation of the bearing pad, which converges to the solution of the coupled problem. In addition, we formulate a multi-objective optimization problem, and seek combinations of the design variables, namely, length-to-diameter ratio, Sommerfeld number and bearing deformation coefficient, which minimize simultaneously the normalized friction coefficient and the normalized maximum pressure, under intact and representative fault conditions. Optimal solutions are identified based on the Pareto dominance, and are physically interpreted. The present development provides a tool for optimally reducing the parameter space of independent variables in EHD journal bearing design. © 2010 Springer Science+Business Media B.V.	en
heal.publisher	SPRINGER	en
heal.journalName	Meccanica	en
dc.identifier.doi	10.1007/s11012-010-9319-7	en
dc.identifier.isi	ISI:000290727000010	en
dc.identifier.volume	46	en
dc.identifier.issue	3	en
dc.identifier.spage	577	en
dc.identifier.epage	588	en