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A touchdown bearing with surface waviness: A dynamic model using a multibody approach

dc.contributor.authorHalminen, Oskari
dc.contributor.authorFernández-Aceituno, Javier
dc.contributor.authorEscalona, José Luis
dc.contributor.authorSopanen, Jussi
dc.contributor.authorMikkola, Aki
dc.date.accessioned2025-10-07T10:32:16Z
dc.date.available2025-10-07T10:32:16Z
dc.date.issued2017
dc.description.abstractThe amount of vibration induced by surface waviness in a touchdown bearing can be modelled with a multibody approach. This study develops a multibody model that accounts for surface waviness in races of touchdown bearings and employs the model to define the dissimilarities of the rotor and inner ring movements, and to perform inner ring velocity analysis in the frequency domain. Model results are compared with measured and simulated outcomes in the literature. Large movements are found in the orbits and velocities in the frequency domain due to surface waviness. Inner race eccentricity and ellipticity seem to be the cause of the most damaging surface waviness. In the frequency domain, all the significant peaks were noticed to be multiplications of rotor pendulum frequency, and the frequency of the inner ring was traceable in cases with waviness in the bearing. The model proposed in this study enables waviness to be taken into account in design of touchdown bearings.
dc.identifier.other10.1177/1464419317689946
dc.identifier.urihttps://hdl.handle.net/10953/6175
dc.language.isoeng
dc.publisherSAGE
dc.relation.ispartofProc IMechE Part K: J Multi-body Dynamics [2017]; [23]; 658-669
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectMultibody model
dc.subjectElastic method
dc.subjectTouchdown bearing
dc.subjectWaviness
dc.subjectOrbits
dc.subjectFast Fourier transform
dc.subject.udc3310
dc.titleA touchdown bearing with surface waviness: A dynamic model using a multibody approach
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion

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