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Vibration Analysis of the Gas Turbine Considering Dependency of Stiffness and Damping on Frequency

Authors: Hamed Jamshidi, Pooya Djamshidi


In this paper the complete rotor system including elastic shaft with distributed mass, allowing for the effects of oil film in bearings. Also, flexibility of foundation is modeled. As a whole this article is a relatively complete research in modeling and vibration analysis of rotor considering gyroscopic effect, damping, dependency of stiffness and damping coefficients on frequency and solving the vibration equations including these parameters. On the basis of finite element method and utilizing four element types including element of shaft, disk, bearing and foundation and using MATLAB, a computer program is written. So the responses in several cases and considering different effects are obtained. Then the results are compared with each other, with exact solutions and results of other papers.

Keywords: Modeling, Finite Element Method, damping coefficients, Rotor vibration

Digital Object Identifier (DOI):

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[1] Hamrock , Bernard , Fundamental of lubrication with fluid film , Translated by Asghar Baradaran Rahimi 1377 (in persian).
[2] Thomson, W.T. and Dahleh, M.D., 1998, "Theory of Vibration with Applications", Prentice-Hall, New Jersey, 5th Ed.
[3] Rao, S.S., 1995, Mechanical Vibration, 3rd Ed., Addison-Wesley.
[4] Rao, S.S., 1983, Rotor Dynamics, John Wiley & Sons, New York.
[5] Childs, D.W., 1993, Turbomachinery Rotor dynamics, Phenomena, Modeling an Analysis, John Wiley & Sons, New York.
[6] Weaver, W., Johnson, P.R., 1984, Finite Element for Structural Analysis, Prentice-Hall, Inc.
[7] Cook, R.D., Malkus, D.S., Plesha, M.E., 1989, Concepts and Applications of Finite Element Analysis, 3rd Ed., John Wiley & Sons, New York.
[8] D-Souza, A.F., Garg, V.K., 1984, Advanced Dynamics Modeling and Analysis, Prentice-Hall, New Jersey.
[9] Timoshenko, S., Young, D.H., Weaver, W., 1974, Vibration Problems in Engineering, 4th Ed., John Wiley & Sons, New York.
[10] Firoozian, R., Stanway, R., 1989, "Design and Application of Finite Element Package for Modeling Turbomachinery Vibrations", Journal of Sound and Vibration, Vol. 134(1), P. 115-137.
[11] Gmur, T.C., Rodrigues, J.D., 1991, "Shaft Finite Element for Rotor Dynamics Analysis", Journal of Vibration and Acoustics, Vol. 113, p. 482-493.
[12] Rieger, N.F., 1988, Rotordynamics 2-Problems in Turbomachinery, CISM, Italy.
[13] Ehrich, F.F., 1992, Handbook of Rotordynamics, McGraw-Hill, New York.
[14] Dimarogonas, A.D., Paipetis, S.A., 1983, Analytical Methods in Rotordynamics, Applied Science Publisher