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Dynamic behaviour of three-dimensional planetary geared rotor systems

Ali Tatar, Christoph W. Schwingshackl, Michael Friswell

Mechanism and Machine Theory, Volume: 134, Pages: 39 - 56

Swansea University Author: Michael Friswell

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DOI (Published version): 10.1016/j.mechmachtheory.2018.12.023

Abstract

A six degrees of freedom dynamic model of a planetary geared rotor system with equally spaced planets is developed by considering gyroscopic effects. The dynamic model is created using a lumped parameter model of the planetary gearbox and a finite element model of the rotating shafts using Timoshenk...

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Published in: Mechanism and Machine Theory
ISSN: 0094-114X
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa48076
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first_indexed 2019-01-08T14:02:16Z
last_indexed 2019-02-25T19:53:43Z
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spelling 2019-02-25T15:58:11.0499510 v2 48076 2019-01-08 Dynamic behaviour of three-dimensional planetary geared rotor systems 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2019-01-08 FGSEN A six degrees of freedom dynamic model of a planetary geared rotor system with equally spaced planets is developed by considering gyroscopic effects. The dynamic model is created using a lumped parameter model of the planetary gearbox and a finite element model of the rotating shafts using Timoshenko beams. The gears and carrier in the planetary gearbox are assumed to be rigid, and the gear teeth contacts and bearing elements are assumed to be flexible. The modal analysis results show that torsional and axial vibrations on the shafts are coupled in the helical gearing configuration due to the gear helix angle whereas these vibrations become uncoupled for spur gearing. Mainly, the vibration modes are classified as coupled torsional-axial, lateral and gearbox for the helical gear configuration, and torsional, axial, lateral and gearbox for the spur gear configuration. Modal energy analysis is used to quantify the coupling level between the shafts and the planetary gearbox, highlighting the impact of the gearbox on certain mode families. Gyroscopic effects of the planetary gearbox are found to be of great importance in the gearbox dominated modes. Journal Article Mechanism and Machine Theory 134 39 56 0094-114X Planetary gearbox, Rotor dynamics, Gear dynamics, Geared rotor, Modal analysis, Modal energy 30 4 2019 2019-04-30 10.1016/j.mechmachtheory.2018.12.023 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2019-02-25T15:58:11.0499510 2019-01-08T10:26:31.2401977 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Ali Tatar 1 Christoph W. Schwingshackl 2 Michael Friswell 3 0048076-08012019115037.pdf tatar2018.pdf 2019-01-08T11:50:37.1930000 Output 3310841 application/pdf Accepted Manuscript true 2019-12-26T00:00:00.0000000 true eng
title Dynamic behaviour of three-dimensional planetary geared rotor systems
spellingShingle Dynamic behaviour of three-dimensional planetary geared rotor systems
Michael Friswell
title_short Dynamic behaviour of three-dimensional planetary geared rotor systems
title_full Dynamic behaviour of three-dimensional planetary geared rotor systems
title_fullStr Dynamic behaviour of three-dimensional planetary geared rotor systems
title_full_unstemmed Dynamic behaviour of three-dimensional planetary geared rotor systems
title_sort Dynamic behaviour of three-dimensional planetary geared rotor systems
author_id_str_mv 5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv 5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author Michael Friswell
author2 Ali Tatar
Christoph W. Schwingshackl
Michael Friswell
format Journal article
container_title Mechanism and Machine Theory
container_volume 134
container_start_page 39
publishDate 2019
institution Swansea University
issn 0094-114X
doi_str_mv 10.1016/j.mechmachtheory.2018.12.023
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 A six degrees of freedom dynamic model of a planetary geared rotor system with equally spaced planets is developed by considering gyroscopic effects. The dynamic model is created using a lumped parameter model of the planetary gearbox and a finite element model of the rotating shafts using Timoshenko beams. The gears and carrier in the planetary gearbox are assumed to be rigid, and the gear teeth contacts and bearing elements are assumed to be flexible. The modal analysis results show that torsional and axial vibrations on the shafts are coupled in the helical gearing configuration due to the gear helix angle whereas these vibrations become uncoupled for spur gearing. Mainly, the vibration modes are classified as coupled torsional-axial, lateral and gearbox for the helical gear configuration, and torsional, axial, lateral and gearbox for the spur gear configuration. Modal energy analysis is used to quantify the coupling level between the shafts and the planetary gearbox, highlighting the impact of the gearbox on certain mode families. Gyroscopic effects of the planetary gearbox are found to be of great importance in the gearbox dominated modes.
published_date 2019-04-30T03:58:22Z
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score 11.012678

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