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Lubricants 2017, 5(2), 17; doi:10.3390/lubricants5020017

Full Dynamic Ball Bearing Model with Elastic Outer Ring for High Speed Applications

Chair of Applied Mechanics, Technical University of Munich, 85748 Garching, Germany
These authors contributed equally to this work.
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Academic Editor: Michel Fillon
Received: 30 April 2017 / Revised: 2 June 2017 / Accepted: 3 June 2017 / Published: 12 June 2017
(This article belongs to the Special Issue Bearings in Turbomachinery)
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Abstract

Ball bearings are commonly used in high speed turbomachinery and have a critical influence on the rotordynamic behavior. Therefore, a simulation model of the bearing to predict the dynamic influence is essential. The presented model is a further step to develop an accurate and efficient characterization of the ball bearing’s rotor dynamic parameters such as stiffness and deflections as well as vibrational excitations induced by the discrete rolling elements. To make it applicable to high speed turbomachinery, the model considers centrifugal forces, gyroscopic effects and ball spinning. The consideration of an elastic outer ring makes the bearing model suitable for integrated lightweight bearing constructions used in modern aircraft turbines. In order to include transient rotordynamic behavior, the model is built as a full dynamic multibody simulation with time integration. To investigate the influence of the elasticity of the outer ring, a comparison with a rigid formulation for several rotational speeds and loads is presented. View Full-Text
Keywords: ball bearing; elastic outer ring; rotordynamics; vibrations; model reduction; multibody simulation ball bearing; elastic outer ring; rotordynamics; vibrations; model reduction; multibody simulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wagner, C.; Krinner, A.; Thümmel, T.; Rixen, D. Full Dynamic Ball Bearing Model with Elastic Outer Ring for High Speed Applications. Lubricants 2017, 5, 17.

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