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

  • W. Cruz Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ingeniería, Departamento de Ingeniería Mecánica y Mecatrónica, Grupo de Investigación en Diseño Óptimo Multidisciplinario, Cra. 30 no. 45-03, Bogotá, 11132, Colombia
  • N. Arzola Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ingeniería, Departamento de Ingeniería Mecánica y Mecatrónica, Grupo de Investigación en Diseño Óptimo Multidisciplinario, Cra. 30 no. 45-03, Bogotá, 111321, Colombia, narzola@unal.edu.co
  • O. Araque Department of Mechanical Engineering, Universidad de Ibagué, Ibagué 730001, Colombia
Keywords: Rotor dynamics, Critical speed, Lateral vibration, Finite element analysis, Stiffness; Damping

Abstract

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.

Published
2019-09-27
How to Cite
Cruz, W., Arzola, N., & Araque, O. (2019). Modeling and experimental validation of the vibration in an unbalance multi-stage rotor. Journal of Mechanical Engineering and Sciences, 13(3), 5703 - 5716. https://doi.org/10.15282/jmes.13.3.2019.30.0456