Subcritical vibrations of a large flexible rotor efficiently reduced by modifying the bearing inner ring roundness profile

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Viitala, Raine
dc.contributor.author Widmaier, Thomas
dc.contributor.author Kuosmanen, Petri
dc.date.accessioned 2018-04-04T09:38:28Z
dc.date.available 2018-04-04T09:38:28Z
dc.date.issued 2018-09-15
dc.identifier.citation Viitala , R , Widmaier , T & Kuosmanen , P 2018 , ' Subcritical vibrations of a large flexible rotor efficiently reduced by modifying the bearing inner ring roundness profile ' Mechanical Systems and Signal Processing , vol 110 , pp. 42-58 . DOI: 10.1016/j.ymssp.2018.03.010 en
dc.identifier.issn 0888-3270
dc.identifier.issn 1096-1216
dc.identifier.other PURE UUID: c25a1952-1646-4d6a-99fc-977ea9526b7d
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/subcritical-vibrations-of-a-large-flexible-rotor-efficiently-reduced-by-modifying-the-bearing-inner-ring-roundness-profile(c25a1952-1646-4d6a-99fc-977ea9526b7d).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85043993673&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/27986959/ENG_Viitala_Subcrical_vibrations_Mechanical_systems_and_signal_processing.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/30602
dc.description.abstract Undesired vibration of a rotor is harmful for industrial processes and decreases the machine lifetime. In industrial processes, large rotors are commonly operated below the critical speed. In the subcritical speed range, the bearings are an important excitation source of vibration. The bearing inner ring based excitation is observed at a frequency, which is the rotor rotating frequency multiplied by the number of undulations in the roundness profile of the roller race of the bearing inner ring. Subcritical resonance occurs, when the bearing excitation frequency equals the natural frequency of the rotor system. The present study investigates the effect of the bearing inner ring roundness profile on the subcritical vibrations of a flexible rotor. The roundness profile of the bearing inner ring was measured, while installed on the rotor shaft. The roundness profile was modified to five different geometries to investigate different excitation cases. Finally, the roundness error of the inner ring was minimized. The rotor subcritical vibration was measured with each bearing inner ring geometry in the horizontal and vertical directions. The analysis was focused on the 2nd, 3rd and 4th harmonic vibration components, occurring at 1/2, 1/3 and 1/4 of the critical rotational speed. The results clearly suggest that the roundness profile of the roller race of the bearing inner ring affects the rotor subcritical vibration significantly. The increased waviness components of the bearing inner ring roundness profile increased the corresponding subcritical vibration amplitude. Minimizing the roundness error decreased the subcritical vibration substantially. en
dc.format.extent 17
dc.format.extent 42-58
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Mechanical Systems and Signal Processing en
dc.relation.ispartofseries Volume 110 en
dc.rights openAccess en
dc.subject.other Control and Systems Engineering en
dc.subject.other Signal Processing en
dc.subject.other Civil and Structural Engineering en
dc.subject.other Aerospace Engineering en
dc.subject.other Mechanical Engineering en
dc.subject.other Computer Science Applications en
dc.subject.other 214 Mechanical engineering en
dc.title Subcritical vibrations of a large flexible rotor efficiently reduced by modifying the bearing inner ring roundness profile en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Engineering Design
dc.contributor.department Department of Mechanical Engineering en
dc.subject.keyword Dynamic run-out
dc.subject.keyword Four-point method
dc.subject.keyword Low-order bearing waviness
dc.subject.keyword Rotor dynamics
dc.subject.keyword Control and Systems Engineering
dc.subject.keyword Signal Processing
dc.subject.keyword Civil and Structural Engineering
dc.subject.keyword Aerospace Engineering
dc.subject.keyword Mechanical Engineering
dc.subject.keyword Computer Science Applications
dc.subject.keyword 214 Mechanical engineering
dc.identifier.urn URN:NBN:fi:aalto-201804042065
dc.identifier.doi 10.1016/j.ymssp.2018.03.010
dc.type.version publishedVersion


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