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Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor

ELIJAH CHIPATO, Alexander Shaw Orcid Logo, Michael Friswell

Communications in Nonlinear Science and Numerical Simulation, Volume: 62, Pages: 78 - 89

Swansea University Authors: ELIJAH CHIPATO, Alexander Shaw Orcid Logo, Michael Friswell

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DOI (Published version): 10.1016/j.cnsns.2018.02.016

Abstract

In this study a mechanical model of an overhung rotor is explored to determine the effect of gravity on the nonlinear dynamics of an aero-engine. The model is an overhung disc with rotor-stator contact. The model has two degrees of freedom with lumped parameters; friction is neglected in the contact...

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Published in: Communications in Nonlinear Science and Numerical Simulation
ISSN: 10075704
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa38838
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spelling 2022-11-15T16:16:57.3843006 v2 38838 2018-02-22 Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor 65726ec10600a40ff6bf78bb4f09780a ELIJAH CHIPATO ELIJAH CHIPATO true false 10cb5f545bc146fba9a542a1d85f2dea 0000-0002-7521-827X Alexander Shaw Alexander Shaw true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2018-02-22 In this study a mechanical model of an overhung rotor is explored to determine the effect of gravity on the nonlinear dynamics of an aero-engine. The model is an overhung disc with rotor-stator contact. The model has two degrees of freedom with lumped parameters; friction is neglected in the contact and the equations of motion are non-dimensionalised. A parametric study of the non-dimensional gravity parameter is conducted. The bifurcation plots show that gravity plays a crucial role in the nonlinear dynamics of such systems. With zero gravity, as explored in earlier studies, the model has synchronous whirling solutions, and asynchronous partially contacting solutions that are periodic only when viewed in a rotating coordinate system. If the gravity parameter is non-zero, then the dynamics observed are much richer and show additional multi-periodic and chaotic solutions in the stationary frame and continuous contact (full annular rub). Journal Article Communications in Nonlinear Science and Numerical Simulation 62 78 89 10075704 Overhung rotor; Rotor stator contact; Bifurcation; Chaos; Internal resonance 31 12 2018 2018-12-31 10.1016/j.cnsns.2018.02.016 COLLEGE NANME COLLEGE CODE Swansea University 2022-11-15T16:16:57.3843006 2018-02-22T08:47:17.0366616 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised ELIJAH CHIPATO 1 Alexander Shaw 0000-0002-7521-827X 2 Michael Friswell 3 0038838-22022018084913.pdf chipato2018.pdf 2018-02-22T08:49:13.7130000 Output 5795628 application/pdf Accepted Manuscript true 2019-02-16T00:00:00.0000000 true eng
title Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
spellingShingle Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
ELIJAH CHIPATO
Alexander Shaw
Michael Friswell
title_short Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
title_full Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
title_fullStr Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
title_full_unstemmed Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
title_sort Effect of gravity-induced asymmetry on the nonlinear vibration of an overhung rotor
author_id_str_mv 65726ec10600a40ff6bf78bb4f09780a
10cb5f545bc146fba9a542a1d85f2dea
5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 65726ec10600a40ff6bf78bb4f09780a_***_ELIJAH CHIPATO
10cb5f545bc146fba9a542a1d85f2dea_***_Alexander Shaw
5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author ELIJAH CHIPATO
Alexander Shaw
Michael Friswell
author2 ELIJAH CHIPATO
Alexander Shaw
Michael Friswell
format Journal article
container_title Communications in Nonlinear Science and Numerical Simulation
container_volume 62
container_start_page 78
publishDate 2018
institution Swansea University
issn 10075704
doi_str_mv 10.1016/j.cnsns.2018.02.016
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description In this study a mechanical model of an overhung rotor is explored to determine the effect of gravity on the nonlinear dynamics of an aero-engine. The model is an overhung disc with rotor-stator contact. The model has two degrees of freedom with lumped parameters; friction is neglected in the contact and the equations of motion are non-dimensionalised. A parametric study of the non-dimensional gravity parameter is conducted. The bifurcation plots show that gravity plays a crucial role in the nonlinear dynamics of such systems. With zero gravity, as explored in earlier studies, the model has synchronous whirling solutions, and asynchronous partially contacting solutions that are periodic only when viewed in a rotating coordinate system. If the gravity parameter is non-zero, then the dynamics observed are much richer and show additional multi-periodic and chaotic solutions in the stationary frame and continuous contact (full annular rub).
published_date 2018-12-31T03:49:15Z
_version_ 1763752390401458176
score 11.037056

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