Nonlinear vibration analysis for a Jeffcott rotor with seal and air-film bearing excitations
type: Item
instance of: scholarly article
title: Nonlinear vibration analysis for a Jeffcott rotor with seal and air-film bearing excitations
zbMATH Open document ID: 1191.74018
DOI: 10.1155/2010/657361
author: Yuefang Wang
author: Xiao-Yan Wang
published in: Mathematical Problems in Engineering
publication date: 2010-04-23T00:00:00Z
full work available at URL: https://eudml.org/doc/231406
review text: Summary: The nonlinear coupling vibration and bifurcation of a high-speed centrifugal compressor with a labyrinth seal and two air-film journal bearings are presented in this paper. The rotary shaft and disk are modeled as a rigid Jeffcott rotor. Muszynska's model is used to express the seal force with multiple parameters. For air-film journal bearings, the model proposed by Zhang et al. is adopted to express unsteady bearing forces. The Runge-Kutta method is used to numerically determine the vibration responses of the disk center and the bearings. Bifurcation diagrams for transverse motion of the rotor are presented with parameters of rotation speed and pressure drop of the seal. Multiple subharmonic, periodic, and quasiperiodic motions are presented with two seal-pressure drops. The bifurcation characteristics show inherent interactions between forces of the air-film bearings and the seal, presenting more complicated rotor dynamics than the one with either of the forces alone. Bifurcation diagrams are obtained with parameters of pressure drop and seal length determined for the sake of operation safety.
Mathematics Subject Classification ID: 74H45
zbMATH DE Number: 5700510
Wikidata QID: Q58653250
MaRDI profile type: Publication
OpenAlex ID: W2067540999
cites work: Modeling of Nonlinear Oil-Film Force Acting on a Journal with Unsteady Motion and Nonlinear Instability Analysis under the Model
cites work: Α Review on Some New Recently Developed Nonlinear Analytical Techniques
description: scientific article; zbMATH DE number 5700510