Study of the lateral vibration in a multistage rotor

Carlos Yesid Mendivelso-Duarte; Nelson Arzola de la Peña; Wilmer Cruz Guayacundo

doi:10.17533/udea.redin.20191154

Authors

Carlos Yesid Mendivelso-Duarte National University of Colombia
Nelson Arzola de la Peña National University of Colombia
Wilmer Cruz Guayacundo National University of Colombia

DOI:

https://doi.org/10.17533/udea.redin.20191154

Keywords:

critical speed, lateral vibration, damping, rotor, transfer matrix

Abstract

This paper presents the development of theoretical and experimental models for the study of rotodynamic behavior of a multistage rotor. The transfer matrix method, which includes the characteristics of stiffness and damping for the supports and the stages respectively as well as the characteristics of unbalance in the stages, is used for the theoretical model. The data from a physical model was employed as a way of validating the theoretical results. The first two critical speeds were determined with the theoretical model and they differ in a low percentage with respect to the values measured experimentally. Moreover, the vibration level recorded in the physical model rises 2.5 times when the multistage rotor approaches the first two critical speeds. In addition to this, significant displacements of the lateral critical speeds are noticeable when an increase in mass imbalance is induced in several of the rotor impellers.

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Author Biographies

Carlos Yesid Mendivelso-Duarte, National University of Colombia

Research Group in Optimal Multidisciplinary Design, Department of Mechanical and Mechatronics Engineering.

Nelson Arzola de la Peña, National University of Colombia

Associate professor, Research Group in Optimal Multidisciplinary Design, Department of Mechanical and Mechatronics Engineering.

Wilmer Cruz Guayacundo, National University of Colombia

Research Group in Optimal Multidisciplinary Design, Department of Mechanical and Mechatronics Engineering.

References

S. Hsieh, J. Chen, and A. Lee, “A modified transfer matrix method for asymmetric rotor-bearing systems,” Journal of Sound and Vibration, vol. 312, no. 4, May 20 2008. [Online]. Available: https://doi.org/10.1016/j.jsv.2008.01.006

J. Vance, B. Murphy, and H. Tripp, “Critical speeds of turbomachinery. computer predictions vs. experimental measurements,” in 13th Turbomachinery Symposium, Texas, USA, 1984, pp. 105–130.

A. Lee, Y. Kang, and S. Liu, “A modified transfer matrix method for linear rotor-bearing systems,” Journal of Applied Mechanics, vol. 58, no. 3, September 1 1991. [Online]. Available: https://doi.org/10.1115/1.2897263

J. S. Rao, Ed., History of Rotating Machinery Dynamics, ser. History of Mechanism and Machine Science 20. Springer, 2011, p. 358.

B. O. Al-Bedoor and A. A. Al-Qaisia, “Stability analysis of rotating blade bending vibration due to torsional excitation,” Journal of Sound and Vibration, vol. 282, no. 3, April 22 2005. [Online]. Available: https://doi.org/10.1016/j.jsv.2004.03.038

M. M. Leonhard, U. Kern, K., and K. Reisc, “Electric power supply exciting torsional and lateral vibrations of an integrally geared turbocompressor,” in 30th Turbomachinery Symposium, Texas, USA, 2001, pp. 49–56.

M. Kita, T. Hataya, and Y. Tokisama, “Study of a rotordynamic anal-ysis method that considers torsional and lateral coupled vibrations in compressor trains with a gearbox,” in 36th Turbomachinery Symposium, Texas, USA, 2007, pp. 31–37.

S. T. Myrick, W. B. Crawford, and G. L. Schumpert, “Changing and controlling the “first critical speed” of overhung centrifugal fans,” in 33th Turbomachinery Symposium, Texas, USA, 2004, pp. 33–40.

J. C. Nicholas and J. A. Kocur, “Rotordynamic design of centrifugal compressors in accordance with the new API stability specifications,” in 34th Turbomachinery Symposium, Texas, USA, 2005, pp. 25–34.

J. Vance, F. Zeidan, and B. Murphy, Machinery Vibration and Rotordynamics. New Jersey, EE.UU: John Wiley & Sons, Inc., 2010.

A. D. Dimarogonas, S. A. Paipetis, and T. G. Chondros, Eds., Analytical Methods in Rotor Dynamics, ser. Mechanisms and Machine Science 9. Patras, GR: Springer, 2013, p. 288.

M. L. Adams, Rotating Machinery Vibration. From Analysis to Troubleshooting, 2nd ed. Boca Ratón, FL: CRC Press, 2009.

H. Ma, H. Li, H. Niu, R. Song, and B. Wen, “Nonlinear dynamic analysis of a rotor-bearing-seal system under two loading conditions,” Journal of Sound and Vibration, vol. 332, no. 23, November 11 2013. [Online]. Available: https://doi.org/10.1016/j.jsv.2013.05.014