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CLC number: TH117.2

On-line Access: 2011-01-06

Received: 2010-03-31

Revision Accepted: 2010-09-29

Crosschecked: 2010-12-10

Cited: 8

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.1 P.46-55

http://doi.org/10.1631/jzus.A1000130


Nonlinear dynamic analysis of a rotor/bearing/seal system


Author(s):  Wei Li, Yi Yang, De-ren Sheng, Jian-hong Chen, Yong-qiang Che

Affiliation(s):  Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   Energy@zju.edu.cn

Key Words:  Nonlinear, Rotor system, Hamilton principle, Dynamic, Finite element method (FEM)


Wei Li, Yi Yang, De-ren Sheng, Jian-hong Chen, Yong-qiang Che. Nonlinear dynamic analysis of a rotor/bearing/seal system[J]. Journal of Zhejiang University Science A, 2011, 12(1): 46-55.

@article{title="Nonlinear dynamic analysis of a rotor/bearing/seal system",
author="Wei Li, Yi Yang, De-ren Sheng, Jian-hong Chen, Yong-qiang Che",
journal="Journal of Zhejiang University Science A",
volume="12",
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pages="46-55",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1000130"
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%0 Journal Article
%T Nonlinear dynamic analysis of a rotor/bearing/seal system
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%A Yi Yang
%A De-ren Sheng
%A Jian-hong Chen
%A Yong-qiang Che
%J Journal of Zhejiang University SCIENCE A
%V 12
%N 1
%P 46-55
%@ 1673-565X
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000130

TY - JOUR
T1 - Nonlinear dynamic analysis of a rotor/bearing/seal system
A1 - Wei Li
A1 - Yi Yang
A1 - De-ren Sheng
A1 - Jian-hong Chen
A1 - Yong-qiang Che
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 1
SP - 46
EP - 55
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1000130


Abstract: 
In this study a new dynamic model of a rotor system is established based on the hamilton principle and the finite element method (FEM). We analyze the dynamic behavior of the rotor system with the coupled effects of the nonlinear oil film force, the nonlinear seal force, and the mass eccentricity of the disk. The equations of the motion are solved effectively using the fourth order Runge-Kutta method in MATLAB. The dynamic behavior of the system is illustrated by bifurcation diagrams, largest Lyapunov exponents, phase trajectory diagrams, and Poincaré maps. The numerical results show that the rotational speed of the rotor, the pressure drop in the seal, the seal length, the seal clearance, and the mass eccentricity of the disk are the key parameters that significantly affect the dynamic characteristics of the rotor system. The motion of the rotor system exhibits complex types of periodic, quasi-periodic, double-periodic, multi-periodic, and chaotic vibrations. This analysis can be used to guide the design of seal parameters and to diagnose the vibration of rotor/bearing/seal systems.

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Reference

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