Title:	Impact Dynamics in Four-Segment Tilting Pad Journal Bearings Subjected to Pad Fluttering
Authors:	Rendl, Jan Smolík, Luboš Dyk, Štěpán Hajžman, Michal
Citation:	RENDL, J. SMOLÍK, L. DYK, Š. HAJŽMAN, M. Impact Dynamics in Four-Segment Tilting Pad Journal Bearings Subjected to Pad Fluttering. In Proceedings of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 10: 33rd Conference on Mechanical Vibration and Sound (VIB). New York: American Society of Mechanical Engineers (ASME), 2021. s. 1-9. ISBN: 978-0-7918-8547-5
Issue Date:	2021
Publisher:	American Society of Mechanical Engineers (ASME)
Document type:	konferenční příspěvek ConferenceObject
URI:	2-s2.0-85120003717 http://hdl.handle.net/11025/49401
ISBN:	978-0-7918-8547-5
Keywords in different language:	bifurcation analysis;nonlinear hydrodynamic forces;pad fluttering;pad-journal interaction;tilting pad journal bearings
Abstract in different language:	This paper presents a transient analysis of the motion of unloaded upper pads in a tilting pad journal bearing. It is known that such pads can exhibit self-excited vibration called pad fluttering, which can initiate fatigue damage due to elastic contacts between the fluttering pad and the journal. Unlike previous studies, this work attempts to evaluate forces in the contact. This evaluation is done using a robust nonlinear model, which considers hydrodynamic lubrication, out-of-balance forces and Hertzian contacts. Furthermore, qualitative changes of the bearing’s components motions are analysed in a wide range of journal speeds using bifurcation diagrams, phase portraits and estimates of the largest Lyapunov coefficients. The analysis reveals the intriguing nature of the system, which bifurcates between the periodic motion, period-doubling and chaos.
Rights:	Plný text není přístupný. © ASME
Appears in Collections:	Konferenční příspěvky / Conference papers (NTIS) Konferenční příspěvky / Conference Papers (KME) OBD

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