非解析径向轴承支承转子系统非线性动力特性分析

TH13; Nonlinear dynamic behaviors of a rotor dynamical system with finite hydrodynamic bearing supports were investigated.In order to increase the numerical accuracy and decrease computing costs, the isoparametric finite element method based on variational constraint approach is introduced because a...

Full description

Saved in:
Bibliographic Details
Published in上海大学学报（英文版） Vol. 10; no. 3; pp. 247 - 255
Main Authors 吕延军, 虞烈, 刘恒, 张永芳
Format Journal Article
LanguageChinese
Published 西安交通大学%西北工业大学 2006
Subjects
bifurcation
chaos
finite element method
nonlinear dynamics
stability
journal bearing-rotor system
Online AccessGet full text

Cover

More Information
Summary:TH13; Nonlinear dynamic behaviors of a rotor dynamical system with finite hydrodynamic bearing supports were investigated.In order to increase the numerical accuracy and decrease computing costs, the isoparametric finite element method based on variational constraint approach is introduced because analytical bearing forces are not available.This method calculates the oil film forces and their Jacobians simultaneously while it can ensure that they have compatible accuracy.Nonlinear motion of the bearing-rotor system is caused by strong nonlinearity of oil film forces with respect to the displacements and velocities of the center of the rotor.A method consisting of a predictor-corrector mechanism and Newton-Raphson method is presented to calculate equilibrium position and critical speed corresponding to Hopf bifurcation point of the bearing-rotor system.Meanwhile the dynamic coefficients of bearing are obtained.The nonalyzed by the Floquet theory.Chaotic motion of long term dynamic behaviors of the system is an
ISSN:1007-6417