Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30075
Evaluation of Dynamic Behavior of a Rotor-Bearing System in Operating Conditions

Authors: Mohammad Hadi Jalali, Behrooz Shahriari, Mostafa Ghayour, Saeed Ziaei-Rad, Shahram Yousefi


Most flexible rotors can be considered as beam-like structures. In many cases, rotors are modeled as one-dimensional bodies, made basically of beam-like shafts with rigid bodies attached to them. This approach is typical of rotor dynamics, both analytical and numerical, and several rotor dynamic codes, based on the finite element method, follow this trend. In this paper, a finite element model based on Timoshenko beam elements is utilized to analyze the lateral dynamic behavior of a certain rotor-bearing system in operating conditions.

Keywords: Finite element method, Operational deflection shape, Timoshenko beam elements, Unbalance response.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2639


[1] Yi. Chiu, D. Chen, The coupled vibration in a rotating multi-disk rotor system, International Journal of Mechanical Sciences.53 (2011) 1–10.
[2] R. Whalley, A. Abdul-Ameer, Contoured shaft and rotor dynamics, Mechanism and Machine Theory. 44 (2009) 772–783.
[3] 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 (2010) 3780–3797.
[4] B.O. Al-bedoor, Dynamic model of coupled shaft torsional and blade bending deformations in rotors, Comput, Methods Appl. Mech. Engrg, 169 (1999) 177-190.
[5] S.P. Harsha, K. Sandeep, R. Prakash, The effect of speed of balanced rotor on nonlinear vibrations associated with ball bearings, International Journal of Mechanical Sciences. 45 (2003) 725–740.
[6] D. Laxalde, F. Thouverez, J.P. Lombard, Dynamical analysis of multistage cyclic structures, Mechanics Research Communications. 34 (2007) 379–384.
[7] 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.
[8] D. Laxalde, Ch. Pierre, Modeling and analysis of multi-stage systems of mistuned bladed disks, Computers and Structures. 89 (2011) 316–324.
[9] E. Chatelet, F. D’Ambrosio, G. Jacquet-Richardet,Toward global modeling approaches for dynamic analyses of rotating assemblies of turbomachines, Journal of Sound and Vibration. 282 (2005) 163–178.
[10] M.H. Jalali, M. Ghayour, S.Ziaei-Rad, B. Shahriari, Dynamic analysis of a high speed rotor-bearing system, Measurement, 53, (2014) 1-9.
[11] S. Jeon, H. Kwak, S. Yoon, J. Kim, Rotor dynamic analysis of a high thrust liquid rocket engine fuel (Kerosene) turbo pump, Aerospace Science and Technology, 26 (2013) 169-175.
[12] B. Yu, X. Yu, Q. Feng, Simple modeling and modal analysis of reciprocating compressor crankshaft system, Proceedings of International Compressor Engineering Conference, Perdue university, 2010.
[13] G. Genta, Dynamics of Rotating Systems, Mechanical Engineering Series, Springer, 2005.