Dynamic Characteristic and Experiment Research of a Rotor-Bearing System Supported by Oil-Film

Abstract:

The FEM was employed to establish a nonlinear dynamical model of a rotor-bearing experimental system. The fixed interface mode synthesis dimension reduction method was adopted to to save the computing time.The Newmark-β method was employed to solve the reduced model numerically. And the three-dimensional spectrogram, bifurcation diagram, three-dimensional amplitude diagram, chart of axis trajectory, etc were used to analyze the nonlinear characteristic of the dynamic system comparing with those results of the experimental system. Results show that the numerical dynamic model can accurately reflect the characteristics of the nonlinear experimental system. So, it is very important practical significance to apply FEM and dimensional reduction theory into the research of the local nonlinear rotor system, which can provide more accurate verification and reference for the advanced nonlinear dynamic design of the complex rotor system.

• Periodical: Applied Mechanics and Materials (Volumes 29-32)
• Pages: 1732-1737
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.29-32.1732
• Online since: August 2010
• Authors: Chao Feng Li, Ji Shuang Dai, Xiao Peng Li, Bang Chun Wen
• Keywords: Bifurcation, Dynamic Characteristic, High-Dimensional, Nonlinear System

References

[1] P. Sundararajan, S.T. N. An Algorithm for Response and Stability of Large Order Non-linear Systems- Application to Rotor Systems [J]. Journal of Sound and Vibration, Vol. 214 (1998), p.695.

DOI: 10.1006/jsvi.1998.1614

[2] T. Zheng, N. H. Nonlinear Dynamic Behaviors of a Complex Rotor-bearing System[J]. Journal of Applied Mechanics, Vol. 67 (2000), p.485.

[3] T.S. Zheng, X.H. Wu Dynamic Behaviors Numerical Analysis of a Complex Rotor-Bearing System[J]. Journal of Mechanics, Vol. 33 (2001), p.377.

[4] T.S. Zheng. Stability and Bifurcation of a High Dimensional Local Nonlinear Rotor-bearing System [J]. Journal of Aviation, Vol. 19 (1998), p.284.

[5] J.P. Jing, G. Meng, Y. Sun, et al. On the Nonlinear Dynamic Behavior of a Rotor-bearing System.

[6] J.P. Jing, Y. Sun, S.B. Xia. Research on the Nonlinear Dynamic Behavior of a Continuous Rotor-bearing System [J]. Journal of Engineering for Thermal Energy and Power, Vol. 17 (2002), p.607.

[7] Y. Cui, Z.S. Liu. Study on the Nonlinear Stability of the Rotor-Bearing System of the 200mw Turbogenerator [J]. Journal of Mechanical Engineering, Vol. 41 (2005), p.170.

[8] L.G. Wang, J.L. Wang. Stability and Bifurcation of an Elliptic Rotor-bearing System [J]. Journal of Aerospace Power, Vol. 23 (2008), p.263.

[9] A.S. Lee, B.O. Kima, Y.C. Kimb. A Finite Element Transient Response Analysis Method of a Rotor-bearing System to Base Shock Excitations Using the State-Space Newmark Scheme And Comparisons with Experiments [J]. Journal of Sound and Vibration, Vol. 297 (2006).

DOI: 10.1016/j.jsv.2006.04.028

[10] G. Adiletta, A.R. Guido, C. Rossi. Chaotic Motions of a Rigid Rotor in Short Journal Bearings. Nonlinear Dynamics, Vol. 56 (1996), p.251.

DOI: 10.1007/bf00045106