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Titre du document / Document title

Adjoint design sensitivity analysis of molecular gas film lubrication sliders

Auteur(s) / Author(s)

YOON Sang-Joon (1) ; CHOI Dong-Hoon (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Center of Innovative Design Optimization Technology, Hanyang University, Seoul 133-791, COREE, REPUBLIQUE DE

Résumé / Abstract

This paper proposes an analytical design sensitivity analysis (DSA) to topological parameters of MGL (molecular gas film lubrication) sliders by introducing an adjoint variable method. For the analysis of slider air bearings, we used the spatial discretization of the generalized lubrication equation based on a control volume formulation. The residual functions for inverse analysis of the slider are considered as the equality constraint functions. The slider rail heights of all grid cells are chosen as design variables since they are the topological parameters determining air bearing surface (ABS). Then, a complicated adjoint variable equation is formulated to directly handle the highly nonlinear asymmetric coefficient matrix and vector in the discrete system equations of slider air bearings. An alternating direction implicit (ADI) scheme is utilized to efficiently solve large-scale problem in special band storage. The simulation results of DSA are directly compared with those of finite-difference approximation (FDA) to show the effectiveness and accuracy of the proposed approach. The overall sensitivity distribution over the ABS is reported, and clearly shows to which section of the ABS the special attention should be given during the manufacturing process. It is demonstrated that the proposed method can reduce more than 99 percent of the CPU time in comparison with FDA, even though both methods give the same results.

Revue / Journal Title

Journal of tribology    ISSN  0742-4787   CODEN JOTRE9 

Source / Source

2003, vol. 125, no1, pp. 145-151 [7 page(s) (article)] (14 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Society of Mechanical Engineers, New York, NY, ETATS-UNIS  (1984) (Revue)

Mots-clés anglais / English Keywords

Control volume

;

Non linear effect

;

Inverse problem

;

Adjoint method

;

Sensitivity analysis

;

Optimization

;

Analytical method

;

Modeling

;

Heat treatment

;

Ductile cast iron

;

Read head

;

Lubricating film

;

Molecular gas

;

Gaseous lubricant

;

Gas bearing

;

Tribology

;

Mots-clés français / French Keywords

Volume contrôle

;

Effet non linéaire

;

Problème inverse

;

Méthode adjoint

;

Analyse sensibilité

;

Optimisation

;

Méthode analytique

;

Modélisation

;

Traitement thermique

;

Fonte graphite sphéroïdal

;

Tête lecture

;

Film lubrifiant

;

Gaz moléculaire

;

Lubrifiant gazeux

;

Palier gaz

;

Tribologie

;

Mots-clés espagnols / Spanish Keywords

Efecto no lineal

;

Problema inverso

;

Método adjunto

;

Análisis sensibilidad

;

Optimización

;

Método analítico

;

Modelización

;

Tratamiento térmico

;

Fundición grafítica esferoidal

;

Cabeza lectura

;

Película lubricante

;

Gas molecular

;

Lubricante gaseoso

;

Soporte gas

;

Tribología

;

Localisation / Location

INIST-CNRS, Cote INIST : 6120 F, 35400010418284.0160

Nº notice refdoc (ud4) : 14570599



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