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Titre du document / Document title

Reduced weight design of a flexible rotor with ball bearing stiffness characteristics varying with rotational speed and load

Auteur(s) / Author(s)

LEE D.-S. (1) ; CHOI D.-H. (2) ;

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

(1) Engine R&D Center, Engine and Material Division, Daewoo Heavy Industries LTD., Inchon 401-010, COREE, REPUBLIQUE DE
(2) Dept. of Mechanical Design and Production Engineering, Hanyang University, Seoul 133-791, COREE, REPUBLIQUE DE

Résumé / Abstract

This paper presents an effective design approach for reducing the weight of a flexible rotor in ball bearings with rotational speed and load dependent stiffness characteristics under constraints on the system eigenvalues and bearing fatigue life. Design variables are chosen to be the inner radii of shaft elements, the positions of ball bearings, and the preloads on the bearings. The stiffness characteristics of high speed ball bearings are completely described as functions of applied loads and spin speed, and applied to the dynamic behavior analysis of a rotor-bearing system. A transfer matrix method is used to obtain eigenvalues of the system and an augmented Lagrange multiplier (ALM) method is employed as an optimization technique. A multi-stepped rotor supported by two angular contact ball bearings is analyzed and designed to show the speed and load dependent stiffness effect on the system dynamic behavior and to demonstrate the effectiveness of the proposed optimum design approach. The results show that the effect of the stiffness on the system dynamic behavior is noticeable and that the suggested design approach is effective.

Revue / Journal Title

Journal of vibration and acoustics    ISSN  1048-9002 

Source / Source

2000, vol. 122, no3, pp. 203-208 (11 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Society of Mechanical Engineers, New York, NY, ETATS-UNIS  (1990) (Revue)

Mots-clés anglais / English Keywords

Shaft

;

Rolling bearing

;

Ball bearing

;

Flexible rotor

;

Optimization

;

Weight

;

Variable section beam

;

Fatigue fracture

;

Fatigue life

;

Numerical method

;

Transfer matrix

;

Lagrange multiplier

;

Mots-clés français / French Keywords

Arbre transmission

;

Palier roulement

;

Roulement bille

;

Rotor élastique

;

Optimisation

;

Poids

;

Poutre section variable

;

Rupture fatigue

;

Durée vie fatigue

;

Méthode numérique

;

Matrice transfert

;

Multiplicateur Lagrange

;

Mots-clés espagnols / Spanish Keywords

Arbol transmisión

;

Cojinete rodillos

;

Rodamiento bolas

;

Rotor elástico

;

Optimización

;

Peso

;

Viga sección variable

;

Rotura fatiga

;

Longevidad fatiga

;

Método numérico

;

Matriz traspaso

;

Multiplicador Lagrange

;

Localisation / Location

INIST-CNRS, Cote INIST : 6120 L1, 35400009127185.0030

Nº notice refdoc (ud4) : 1459061



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