The Journal of Engine Research

The Journal of Engine Research

Numerical and experimental analysis of lateral vibration of a turbocharger rotor in rotating and non-rotating conditions

Document Type : Original Article

Authors
Bherouz Shahriari 1
Mostafa Ghayour 2
Mohammad Hadi Jalali 3
Mohsen Bahrami 1
1 Faculty of Mechanics, Malek Ashtar University of Technology, Isfahan, Iran
2 Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
3 Department of Mechanical Engineering, Memorial University, Newfoundland and Labrador, Canada
10.22034/er.2023.1975287.0
Abstract
Dynamic analysis and modal analysis of high speed rotors are a vital step in the design and development stages of rotating machines. Turbomachine rotor consists of disks of various shapes, shafts whose diameters change depending on their longitudinal position, and bearings situated at various positions. The vibrations of the rotor in the operating conditions can cause catastrophic failure of the parts or even the whole turbomachine. In this paper, lateral vibrations of a turbocharger rotor in non-rotating and rotating conditions are analyzed numerically using a finite element model based on Timoshenko beam elements. The Campbell diagram, critical speeds, operational deflection shapes and unbalance response of the rotor are the results of numerical dynamic analysis in the operating conditions. Also, the ambient modal testing of the rotor in non-rotating conditions is performed using frequency domain decomposition (FDD) method. In the modal testing, the laser doppler vibrometer and piezoelectric accelerometers are used simultaneously in order to exactly measure the vibrations. The good agreements between the numerical and experimental results show the accuracy of analyses.
Keywords
Turbocharger
High Speed Rotor
Numerical and Experimental Analysis
Lateral Vibration
Ambient Modal Testing
[1] R. Brincker, L. Zhang, P. Andersen, Modal identification of output only systems using frequency domain decomposition, Smart Materials and Structures, 10/3 (2001) 441- 445, https://doi.org/10.1088/0964-1726/10/3/303.
[2] D.J. Ewins, Modal Testing: Theory, Practice and Application, 2nd ed., Research Studies Press, (2000), ISBN: 9780471975182, 0471975184.
[3] G. Genta, Dynamics of Rotating Systems, Springer, (2005), ISBN: 9780387209364, 0387209360.
[4] E. Brusa, G. Zolfini, Dynamics of multi-body rotors: numerical and experimental FEM analysis of the scientific earth experiment Galileo Galilei Ground, Meccanica, 37/3 (2002) 239-254, https://doi.org/10.1023/A:1020147020815.
[5] E. Chatelet, F. D’Ambrosio, G. Jacquet-Richardet, Toward global modelling approaches for dynamic analyses of rotating assemblies of turbomachines, Journal of Sound and Vibration, 282/1-2 (2005) 163-178, https://doi.org/10.1016/j.jsv.2004.02.035.
[6] C. Yang, S. Huang, Coupling vibrations in rotating shaft-disk-blades system, Journal of Vibrations and Acoustics, 129/1 (2007) 48-57, https://doi.org/10.1115/1.2221328.
[7] R. Whalley, A. Abdul-Ameer, Contoured shaft and rotor dynamics, Mechanism and Machine Theory, 44/4 (2009) 772-783, https://doi.org/10.1016/j.mechmachtheory.2008.04.010.
[8] A. Lazarus, B. Prabel, D. Combescure, A 3D finite element model for the vibration analysis of asymmetric rotating machines, Journal of Sound and Vibration, 329/18 (2010) 3780-3797, https://doi.org/10.1016/j.jsv.2010.03.029.
[9] D. Laxalde, J. Lombard, F. Thouverez, Dynamics of multi-stage bladed disks systems, Journal of Engineering for Gas Turbines and Power, 129/4 (2007) 1058-1064, https://doi.org/10.1115/1.2747641.
[10] D. Laxalde, C. Pierre, Modelling and analysis of multi-stage systems of mistuned bladed disks, Computers and Structures, 89/3-4 (2011) 316-324, https://doi.org/10.1016/j.compstruc.2010.10.020.
[11] D. Laxalde, F. Thouverez, J.P. Lombard, Dynamical analysis of multi-stage cyclic structures, Mechanics Research Communications, 34/4 (2007) 379-384, https://doi.org/10.1016/j.mechrescom.2007.02.004.
[12] H. Taplak, M. Parlak, Evaluation of gas turbine rotor dynamic analysis using the finite element method, Measurement, 45/5 (2012) 1089-1097, https://doi.org/10.1016/j.measurement.2012.01.032.
[13] G. Creci, J.C. Menezes, J.R. Barbosa, J.A. Corra, Rotor dynamic analysis of a 5-Kilonewton thrust gas turbine by considering bearing dynamics, Journal of Propulsion and Power, 27/2 (2011) 330-336, https://doi.org/10.2514/1.B34104.
[14] M.H. Jalali, M. Ghayour, S. Ziaei-Rad, B. Shahriari, Dynamic analysis of high speed rotor-bearing system, Measurement, 53 (2014) 1-9, https://doi.org/10.1016/j.measurement.2014.03.010.
[15] A. Senatore, Measuring the natural frequencies of centrifugally tensioned beam with laser doppler vibrometer, Measurement, 39/7 (2006) 628-633, https://doi.org/10.1016/j.measurement.2006.01.006.

  • Receive Date 20 March 2022
  • Revise Date 26 August 2022
  • Accept Date 26 August 2022