Abstract
A subcritical or supercritical rotor is often employed to improve the energy storage efficiency of flywheel systems. Consequently, it is necessary to introduce Squeeze film dampers (SFD) in the rotor-bearing system to suppress the lateral vibration of the rotor. Although the dynamic behavior of the rotor-bearing system can be investigated in a timely manner with ANSYS software, it is difficult, if not impossible, to directly solve the unbalance responses by the Full method (FM) offered by ANSYS package. The reason is because the stiffness and the damping coefficients of the SFD, which are required in the computation, are in fact functions of eccentricity ratio determined by the unbalance responses. In this paper, the model of the flywheel system was firstly analyzed by QR damped method. Campbell diagram and critical speeds were then obtained from the results. Natural frequencies and their corresponding mode shapes at the rotational speed of 0.1rad·s-1 were also calculated. Then, the unbalance responses of rotor-bearing system with SFD support were solved through iteration and through the FM with ANSYS Parametric design language routine. The comparison between the calculated unbalance responses and the experimental responses indicates that the dynamic model is valid.
Similar content being viewed by others
References
P. Zhao et al., Design and thermodynamic analysis of a hybrid energy storage system based on A-CAES (adiabatic compressed air energy storage) and FESS (flywheel energy storage system) for wind power application, Energy, 70 (2014) 674–684.
S.-A. Mosayebi et al., Field test investigation and numerical analysis of ballasted track under moving locomotive, J. of Mechanical Science and Technology, 30 (3) (2016) 1065–1069.
H. Molatefi et al., Laboratory test and FEM analysis on a developed continuous rail absorber (CRA), J. of Mechanical Science and Technology, 30 (3) (2016) 1049–1054.
O. Özsahin et al., Analytical modeling of asymmetric multisegment rotor-bearing systems with Timoshenko beam modal including gyroscopic moments, Computers and Structures, 144 (2014) 119–126.
S. Jiang and S. Zhen, Dynamic design of a high speed motorized spindle-bearing system, Journal of Mechanical Design, Transactions of ASME, 131 (2010) 034501–1-5.
A. Shanmugam and C. Padmanabhan, A fixed-free interface component mode synthesis method for rotordynamic analysis, J. of Sound and Vibration, 297 (2006) 664–679.
X. Dai et al., On the vibration of rotor-bearing system with squeeze film damper in an energy storage flywheel, International J. of Mechanical Sciences, 43 (2001) 2525–2540.
M. H. Jalali et al., Dynamic analysis of a high speed rotorbearing system, Measurement, 53 (2014) 1–9.
Z. Wang et al., Dynamic analyses for the rotor-journal bearing system of a variable speed rotary compressor, International J. of Refrigeration, 36 (2013) 1938–1950.
B. Bai et al., Analysis of dynamic characteristics of the main shaft system in a hydro-turbine based on ANSYS, International Conference on Advances in Computational Modeling and Simulation, Procedia Engineering, 31 (2012) 654–658.
Yu Tianbiao et al., Modal analysis of spindle system on ultra-high speed grinder, J. of Mechanical Engineering, 48 (17) (2012) 183–188.
S. Na-wei et al., Rotordynamic analysis of a micro gas turbine overhung rotor system supported on floating ring bearing, J. of Vibration and Shock, 31 (3) (2012) 27–31.
J. Samuelsson, Rotor dynamic analysis of 3D-modeled gas turbine rotor in Ansys, Linköping’s University, Sweden (2009).
G. Genta, Dynamics of rotating systems, Springer -Verlag, New York, USA (2004).
G. Jialiu, Rotordynamics, China Defense Industries Press, Beijing, China (1985).
Author information
Authors and Affiliations
Corresponding author
Additional information
Recommended by Associate Editor Eung-Soo Shin
Hongchang Wang received his Ph.D. in Mechanical Engineering from Southeast University in 2012. He is currently a Lecturer in the School of Mechanical Engineering, Jiangsu University of Technology. His research interests include flywheel energy storage, rotor dynamics, and mechanical design.
Rights and permissions
About this article
Cite this article
Wang, H., Du, Z. Dynamic analysis for the energy storage flywheel system. J Mech Sci Technol 30, 4825–4831 (2016). https://doi.org/10.1007/s12206-016-1001-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12206-016-1001-0