Viscous damping exciting friction-induced vibration in pin-on-disk systems

When engineers add damping to a vibrating system, they typically expect that this will result in a more stable system. However, a few rather complex examples are known that show the opposite trend: situations in which damping generates friction-induced vibration (damping paradox). In this study, we...

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Autores principales:	Matthias Graf, Tobias Lankenau
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Friction-induced vibration Damping paradox Viscous damping Modeling brake Pin-on-disk Technology T
Acceso en línea:	https://doaj.org/article/bace0cc1f86641a6a8a07464a43c71d9
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id	oai:doaj.org-article:bace0cc1f86641a6a8a07464a43c71d9
record_format	dspace
spelling	oai:doaj.org-article:bace0cc1f86641a6a8a07464a43c71d92021-11-20T05:13:08ZViscous damping exciting friction-induced vibration in pin-on-disk systems2590-123010.1016/j.rineng.2021.100299https://doaj.org/article/bace0cc1f86641a6a8a07464a43c71d92021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2590123021001006https://doaj.org/toc/2590-1230When engineers add damping to a vibrating system, they typically expect that this will result in a more stable system. However, a few rather complex examples are known that show the opposite trend: situations in which damping generates friction-induced vibration (damping paradox). In this study, we demonstrate that a simple but new surrogate model suffices to explain this effect, by analyzing a model with only one degree of freedom and a constant coefficient of friction. The instability of this model increases with an increase in the viscous damping coefficient perpendicular to the sliding direction. This shows that an unfavorable combination of geometric mounting of a friction-exposed mass together with ill-positioned damping can generate friction-induced vibration that would not appear without damping. The results are confirmed by finite element analysis and the corresponding complex eigenvalues. The excited mode shapes and frequencies correspond well with laboratory tests. This has consequences for applications such as the development of vehicle brake shims, which provide damping properties perpendicular to the sliding direction.Matthias GrafTobias LankenauElsevierarticleFriction-induced vibrationDamping paradoxViscous dampingModeling brakePin-on-diskTechnologyTENResults in Engineering, Vol 12, Iss , Pp 100299- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Friction-induced vibration Damping paradox Viscous damping Modeling brake Pin-on-disk Technology T
spellingShingle	Friction-induced vibration Damping paradox Viscous damping Modeling brake Pin-on-disk Technology T Matthias Graf Tobias Lankenau Viscous damping exciting friction-induced vibration in pin-on-disk systems
description	When engineers add damping to a vibrating system, they typically expect that this will result in a more stable system. However, a few rather complex examples are known that show the opposite trend: situations in which damping generates friction-induced vibration (damping paradox). In this study, we demonstrate that a simple but new surrogate model suffices to explain this effect, by analyzing a model with only one degree of freedom and a constant coefficient of friction. The instability of this model increases with an increase in the viscous damping coefficient perpendicular to the sliding direction. This shows that an unfavorable combination of geometric mounting of a friction-exposed mass together with ill-positioned damping can generate friction-induced vibration that would not appear without damping. The results are confirmed by finite element analysis and the corresponding complex eigenvalues. The excited mode shapes and frequencies correspond well with laboratory tests. This has consequences for applications such as the development of vehicle brake shims, which provide damping properties perpendicular to the sliding direction.
format	article
author	Matthias Graf Tobias Lankenau
author_facet	Matthias Graf Tobias Lankenau
author_sort	Matthias Graf
title	Viscous damping exciting friction-induced vibration in pin-on-disk systems
title_short	Viscous damping exciting friction-induced vibration in pin-on-disk systems
title_full	Viscous damping exciting friction-induced vibration in pin-on-disk systems
title_fullStr	Viscous damping exciting friction-induced vibration in pin-on-disk systems
title_full_unstemmed	Viscous damping exciting friction-induced vibration in pin-on-disk systems
title_sort	viscous damping exciting friction-induced vibration in pin-on-disk systems
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/bace0cc1f86641a6a8a07464a43c71d9
work_keys_str_mv	AT matthiasgraf viscousdampingexcitingfrictioninducedvibrationinpinondisksystems AT tobiaslankenau viscousdampingexcitingfrictioninducedvibrationinpinondisksystems
_version_	1718419562907566080

Viscous damping exciting friction-induced vibration in pin-on-disk systems

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