Skip Navigation Links
Journal of Vibration Testing and System Dynamics

C. Steve Suh (editor), Pawel Olejnik (editor),

Xianguo Tuo (editor)

Pawel Olejnik (editor)

Lodz University of Technology, Poland

Email: pawel.olejnik@p.lodz.pl

C. Steve Suh (editor)

Texas A&M University, USA

Email: ssuh@tamu.edu

Xiangguo Tuo (editor)

Sichuan University of Science and Engineering, China

Email: tuoxianguo@suse.edu.cn


Dynamic Characteristics Analysis of Rotor-Bearing System and Experimental Validation

Journal of Vcibration Testing and System Dynamics 4(1) (2020) 51--63 | DOI:10.5890/JVTSD.2020.03.003

Jiarong Liu$^{1}$,$^{2}$, Zhong Luo$^{1}$,$^{2}$, Zhe Ding$^{1}$,$^{2}$, Jinwen Wang$^{1}$,$^{2}$

$^{1}$ School of Mechanical Engineering & Automation, Northeastern University, Shenyang, 110819, PR China

$^{2}$ Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education, Northeastern University, Shenyang 110819, China

Download Full Text PDF

 

Abstract

As for the vibration problem of rotor system for large rotating machinery such as aero engines, a finite element model for dynamic similarity experiment system of rotor is established based on finite element theory. The effect of support stiffness and support position on the dynamic characteristics of the rotor system have been emphatically analyzed. Moreover, the effect of support stiffness on the dynamic characteristics of rotor system have been verified on the designed test rig. The results show that, under different support stiffness intervals, each order natural frequency of the rotor system has a different variation tendency with the support stiffness or position. In addition, the variation of the mode shapes with the support stiffness or position are closely related to the variation of the natural frequencies with the support stiffness and position. Combining with the practice, the natural frequencies of the rotor system can be reasonably designed and the harmful mode shapes can be avoided by adjusting the supporting characteristics of the rotor system.

Acknowledgments

This work was supported by the National Science Foundation of China [grant numbers 11872148, 11572082]; the Fundamental Research Funds for the Central Universities of China [grant numbers N170308028, N160312001]; and the Excellent Talents Support Program in Institutions of Higher Learning in Liaoning Province of China [grant numbers LJQ2015038].

References

  1. [1]  Chouksey, M., Dutt, J.K., and Modak, S.V. (2012), Modal analysis of rotor-shaft system under the influence of rotor-shaft material damping and fluid film forces[J], Mechanism & Machine Theory, 48(1), 81-93.
  2. [2]  Hou, L., Chen, Y., Fu, Y., et al. (2017), Application of the HB–AFT method to the primary resonance analysis of a dual-rotor system[J], Nonlinear Dynamics, 88(4), 2531-2551.
  3. [3]  Zhou, H.L., Luo, G.H., Chen, G., et al. (2013), Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating-ring squeeze film dampers[J], Mechanism & Machine Theory, 59(4), 65-77.
  4. [4]  Bai, C., Xu, Q., and Wang, J. (2011), Effects of flexible support stiffness on the nonlinear dynamic characteristics and stability of a turbopump rotor system[J], Nonlinear Dynamics, 64(3), 237-252.
  5. [5]  Hai, P.M. and Bonello, P. (2011), A computational parametric analysis of the vibration of a three-spool aeroengine under multifrequency unbalance excitation[J], Journal of Engineering for Gas Turbines and Power, 133(7), 072504.
  6. [6]  Chiang, H.W.D., Hsu, C.N., and Tu, S.H. (2012), Rotor-bearing analysis for turbomachinery single- and dual-rotor systems[J], Journal of Propulsion & Power, 20(6), 1096-1104.
  7. [7]  Yang, W., Yuan, H., Hui, L., et al. (2019), Dynamic analysis of flexible shaft and elastic disk rotor system based on the effect of alford force[J], Shock and Vibration, 2019.
  8. [8]  Fei, Z.X., Tong, S.G., and Wei, C. (2013), Investigation of the dynamic characteristics of a dual rotor system and its start-up simulation based on finite element method[J]., Journal of Zhejiang University-Science A (Applied Physics & Engineering), 14(4), 268-280.
  9. [9]  Heydari, H. and Khorram, A. (2019), Effects of location and aspect ratio of a flexible disk on natural frequencies and critical speeds of a rotating shaft-disk system[J], International Journal of Mechanical Sciences.
  10. [10]  Mei, Q. and Ou, Y.X. (2004), Effects of bearing distribution on the dynamical characteristics of two-bearing rotor[J], National Conference on Vibration Engineering and Application (in Chinese).
  11. [11]  Deng, W.Q., Wang, Y., Nie, W.J., et al. (2016), Influence of supporting stiffness and axial location on critical speeds of a low-pressure rotor of a counter rotating engine[J], Aeroengine, 2016(3), 7-11 (in Chinese).
  12. [12]  Han, D., Hao, L., and Yang, J. (2018), Dynamic characteristics of air cycle machine rotor system[J], Shock and Vibration, 2018.
  13. [13]  Ozguven, H.N. (1984), On the critical speed of continuous shaft-disk systems[J], Journal of Vibration, Acoustics, Stress, and Reliability in Design, 106(1), 59-61.
  14. [14]  Nie, W.J., Deng, W.Q., Xu, Y.L., et al. (2015), Analysis on the changes of high-speed flexible rotor critical speeds with supporting stiffness and disk mass[J], Gas Turbine Experiment and Research, 2015(3), 19-24 (in Chinese).
  15. [15]  Liu, Y., Han, J., Zhao, S., et al. (2019), Study on the Dynamic problems of double-disk rotor system supported by deep groove ball bearing[J], Shock and Vibration, 2019.
  16. [16]  Fan, Y., Wang, S., Yang, Z., et al. (2010), Substructure coupled matrix method for vibration analysis of multi-rotor systems[J], Journal of Aerospace Power, 25(03), 623-628 (in Chinese).
  17. [17]  Ramasubramaniam, E.S., Thyla, P.R., and Mahendrakumar, N. (2018), Assessment of accuracy of modal parameters of a rotor dynamic system using different types of finite elements[J], International Journal of Modeling, Simulation, and Scientific Computing, 09(01), 1750062.