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contributor authorZhansheng Liu
contributor authorSenlin Huang
contributor authorJiexian Su
date accessioned2017-05-09T00:26:21Z
date available2017-05-09T00:26:21Z
date copyrightAugust, 2007
date issued2007
identifier issn1048-9002
identifier otherJVACEK-28887#448_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/137117
description abstractConsidering both nonlinear oil film force and unsymmetrical stiffness, this paper presents a mechanical model of a generator-bearing system. The complex mode synthesis method is used to reduce the linear degrees of freedom of the high order model in the rotating coordinates, and one-order modal differential equations are obtained which may not be solved directly by Newmark-β method. To solve this problem, a modified Newmark-β method is presented to investigate dynamic effects of the asymmetry of rotor stiffness, the viscosity of oil, the rotor unbalance and the ratio of length to diameter of bearings. Three-dimension diagrams and unfiltered vibration curves are used as tools to examine the dynamic behavior of the system, and some insights into the dynamic behavior are given. Numerical results show that instability of the system may be improved by modifying these parameters.
publisherThe American Society of Mechanical Engineers (ASME)
titleNonlinear Dynamic Analysis of an Unsymmetrical Generator-Bearing System
typeJournal Paper
journal volume129
journal issue4
journal titleJournal of Vibration and Acoustics
identifier doi10.1115/1.2731407
journal fristpage448
journal lastpage457
identifier eissn1528-8927
keywordsBearings
keywordsRotors
keywordsVibration
keywordsGenerators
keywordsForce
keywordsEquations of motion AND Stiffness
treeJournal of Vibration and Acoustics:;2007:;volume( 129 ):;issue: 004
contenttypeFulltext


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