Frontiers of Mechanical Engineering >

2006 , Vol. 1 >Issue 2: 204 - 208

DOI: https://doi.org/10.1007/s11465-006-0002-6

Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system

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  • 1.School of Mechanical Engineering & Automation, Northeastern University, Shenyang, 110004, China; 2.Faculty of Electromechanical Engineering Guandong Univercity of Technology, Guang dong, 510090, China

Published date: 05 Jun 2006

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Abstract

A dynamic model of a dual-disk vertical over-hung rotor-bearing system is developed, taking into account nonlinear oil-film force. Its dynamic behaviors are investigated by numerical Runge-Kutta method. Its bifurcation and chaos characteristics are analyzed with crack fault and without crack fault. By analyzing the bifurcation plot, Poincare section plots and amplitude spectra, we found that the crack greatly influences the dynamic characteristics of the rotor-bearing system. Because of the strong effect of the nonlinear oil-film force and crack to the system, 1/2 times, 1/3 times frequency components appear in the response spectrum map. The results may bring up theoretical references for fault diagnosis of rotor-bearing systems.

Cite this article

CHEN Hong, LI He, WEN Bang-chun, ZHANG Xiao-wei . Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system[J]. Frontiers of Mechanical Engineering, 2006 , 1(2) : 204 -208 . DOI: 10.1007/s11465-006-0002-6

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