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Modal Parameter Identification of Vertical Rotors with Squeeze-Film Dampers
Division of Concrete Structures, KTH Royal Institute of Technology, Brinellvägen 23, 100 44, Stockholm, Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0001-6016-6342
Vattenfall Research and Development, Älvkarleby, Sweden.
2026 (English)In: Proceedings of the 12th IFToMM International Conference on Rotordynamics / [ed] Jussi Sopanen; Emil Kurvinen; Raine Viitala; Timo Holopainen; Tuhin Choudhury, Springer Nature , 2026, Vol. 1, p. 652-662Conference paper, Published paper (Refereed)
Abstract [en]

In this research paper, the rotordynamic characteristics of a vertical rotor equipped with a squeeze-film damper were investigated. An impact test was simulated on a slender mid-span rotor supported by two structural assemblies located at the top and bottom ends of the shaft. Each assembly consisted of an eight-shoe tilting-pad journal bearing, a squeeze-film damper, and a bracket. The modal parameters were extracted using a continuous wavelet transform. Simulations were performed for two configurations, i.e., one with the squeeze-film damper and one without, to assess the influence of the squeeze-film damper on the overall system’s dynamics. Additional factors, such as rotor speed and unbalance mass, were also varied in the simulations to evaluate their effects. The results showed that the squeeze-film damper significantly improved the damping characteristics of the vertical rotor. Experimental tests were conducted to validate the simulation results, yielding good agreement between the simulations and the experiments. 

Place, publisher, year, edition, pages
Springer Nature , 2026. Vol. 1, p. 652-662
Series
Mechanisms and Machine Science, ISSN 2211-0984, E-ISSN 2211-0992 ; 210
Keywords [en]
squeeze-film damper, vertical rotors, rotordynamic, wavelet transform
National Category
Applied Mechanics
Research subject
Machine Design
Identifiers
URN: urn:nbn:se:ltu:diva-119013DOI: 10.1007/978-3-032-29033-5_54Scopus ID: 2-s2.0-105043036739OAI: oai:DiVA.org:ltu-119013DiVA, id: diva2:2085389
Conference
12th IFToMM International Conference on Rotordynamics (IFToMM 2026), Lahti, Finland, June 22-26, 2026
Note

ISBN for host publication: 978-3-032-29032-8, 978-3-032-29033-5

Available from: 2026-07-08 Created: 2026-07-08 Last updated: 2026-07-08Bibliographically approved

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Aidanpää, Jan-Olov

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