In this paper, a model for vibration of a cracked rotor shaft flexible bearing system with linear-angular coupled DOF in bending is proposed. A vector approach on the change of the system’s angular momentum at a steady state has been used to derive the equation of motion leading to a linear time-variant system. By considering the forces and moments in the kinematic pairs of the shaft and bearing, an equivalent coupled 4-DOF complex spring is analytically introduced to simulate the system at a low rotating speed with the crack as an external force. Consequently, the Kineto-static response has been obtained by restricting the system to strong parameters. Viability of the model for investigating the complex response of a shallow-crack rotor bearing system has been demonstrated by analysis and features in time history and frequency spectra explored for crack detection. Various scenarios are considered, and the presented results concur with the published literature.
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ASME/STLE 2007 International Joint Tribology Conference
October 22–24, 2007
San Diego, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4810-8
PROCEEDINGS PAPER
A Kineto-Static Model for a Cracked Shaft Flexible Bearing System With Linear-Angular Coupled DOF in Bending
Alfayo Anyika Alugongo,
Alfayo Anyika Alugongo
University of South Africa, Florida, South Africa
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Josiah Lange Munda
Josiah Lange Munda
Tswane University of Technology, Pretoria, South Africa
Search for other works by this author on:
Alfayo Anyika Alugongo
University of South Africa, Florida, South Africa
Josiah Lange Munda
Tswane University of Technology, Pretoria, South Africa
Paper No:
IJTC2007-44435, pp. 489-492; 4 pages
Published Online:
March 23, 2009
Citation
Alugongo, AA, & Munda, JL. "A Kineto-Static Model for a Cracked Shaft Flexible Bearing System With Linear-Angular Coupled DOF in Bending." Proceedings of the ASME/STLE 2007 International Joint Tribology Conference. ASME/STLE 2007 International Joint Tribology Conference, Parts A and B. San Diego, California, USA. October 22–24, 2007. pp. 489-492. ASME. https://doi.org/10.1115/IJTC2007-44435
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