Modeling and experimental validation of the vibration in an unbalance multi-stage rotor

Oscar Javier Araque De Los Ríos, Wilmar Cruz, Nelson Arzola

Research output: Contribution to journalArticlepeer-review


This work proposes a finite element method model to predict lateral vibration phenomena arising in the multi-stage rotor (seven stages) with unbalance, including damping and gyroscopic effects. The rotor dynamic analysis includes mathematical and experimental determination of the first and second critical speeds of the rotor and the assessment of the effects induced by the different unbalance combinations. The results show that while considering the unbalance effects in the impellers, critical speeds move to lower frequencies compared to normal conditions when the rotor is properly balanced. Finally, the results obtained analytically achieved a good degree of correspondence with experimental validation tests.
Original languageEnglish
Article number13(3), 2019
Pages (from-to)5703
Number of pages5716
JournalJournal of Mechanical Engineering and Sciences
Issue number3
StatePublished - 29 Sep 2019

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