INFLUENCE OF A LEVELNESS DEFECT IN A THRUST BEARING ON THE DYNAMIC BEHAVIOUR OF AN ELASTIC SHAFT

✍ Scribed by S. BERGER; O. BONNEAU; J. FRÊNE

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 388 KB
• Volume: 249
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2001.3801

✦ Synopsis

This paper examines the non-linear dynamic behaviour of a #exible shaft. The shaft is mounted on two journal bearings and the axial load is supported by a defective hydrodynamic thrust bearing at one end. The defect is a levelness defect of the rotor. The thrust bearing behaviour must be considered to be non-linear because of the e!ects of the defect. The shaft is modelled with typical beam "nite elements including e!ects such as the gyroscopic e!ects. A modal technique is used to reduce the number of degrees of freedom. Results show that the thrust bearing defects introduce supplementary critical speeds. The linear approach is unable to show the supplementary critical speeds which are obtained only by using non-linear analysis.

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