Stability and bifurcation analysis of an overhung rotor with electromagnetic actuators

• Autorzy: Przybyłowicz Piotr M. , Kurnik Włodzimierz

Identyfikatory

DOI

10.15632/jtam-pl/119060

• Języki publikacji: EN

Abstrakty

EN

A rotating system consisting of a slender massless viscoelastic shaft simply supported in rolling bearings and a rigid massive disc mounted to the overhung end of the shaft is considered to study its stabilization against flutter. Instability and transverse vibration occurs due to the internal friction in the shaft. It is shown in the paper that the disc can be stabilized and its bifurcating self-excited vibration can be effectively reduced and modified by contactless radial magnetic actuators, using two alternative control strategies – semi-active utilizing constant or rotation-dependent actuator voltage or fully active with closed-loop state-dependent feedback. The near-critical transverse disc vibration is analyzed using the theory of Hopf bifurcation. Smooth, soft-type self-excitation is presented after activation of the dynamic vibration control which prevents the system from sudden jumps of vibration amplitude near the critical point.

Słowa kluczowe

EN

overhung shaft; massive disc; flutter; bifurcation; magnetic control

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2020
• Tom: Vol. 58 nr 2
• Strony: 525--539
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Przybyłowicz Piotr M.

• Warsaw University of Technology, Institute of Machine Design Fundamentals, Warsaw, Poland

autor

Kurnik Włodzimierz

• Warsaw University of Technology, Institute of Machine Design Fundamentals, Warsaw, Poland

Bibliografia

• 1. Ebrahimi A., Heydari M., Behzad M., 2018, Optimal vibration control of rotors with an open edge crack using an electromagnetic actuator, Journal of Vibration and Control, 24, 1, 37-59, DOI: 10.1177/1077546316631880.
• 2. Eissa M., Saeed N.A., 2018, Nonlinear vibration control of a horizontally supported Jeffcott-rotor system, Journal of Vibration and Control, 24, 24, 5898-5921, DOI: 10.1177/1077546317693928.
• 3. Iooss G., Joseph D.D., 1980, Elementary Stability and Bifurcation Theory, Springer-Verlag, New York.
• 4. Kurnik W., 1995, Self-stabilization of a composite shaft via thermally adaptive plies, Proceedings of the First International Symposium on Thermal Stresses and Related Topics, Hamamatsu, Japan, 541-544.
• 5. Kurnik W., Perek A., 2015, Kinematically excited vibration of a an asymmetric rotor/bearing system with magnetic lubricant, Machine Dynamics Research, 39, 4, 5-19.
• 6. Muszyńska A., 2005, Rotordynamics, CRC Press, BocaRaton.
• 7. Mykhaylyshyn V., 2011, Application of active magnetic force actuator for control of flexible rotor system vibrations, ETD Archive, Paper 664.
• 8. Przybyłowicz P.M., 2015, Stabilization of a rotating shaft by electromagnetic actuators, 86th GAMM Congress, Lecce, Italy, 2015, Book of Abstracts, p. 258.
• 9. Przybyłowicz P.M., 2017, Near-critical behavior of an elastic rotating shaft stabilized by electromagnetic actuators, International Journal of Structural Stability and Dynamics, 17, 5, 1740013-1-15, DOI: 10.1142/S0219455417400132.
• 10. Schweitzer G., Bleuler H., Traxler A., 1994, Active Magnetic Bearings, Zurich, Vdf Hochschulverlag AG.
• 11. Shaw J., Shaw S.W., 1989, Instabilities and bifurcations in a rotating shaft, Journal of Sound and Vibration, 132, 227-244.
• 12. Shekhar S., Sharma N., Roy H.K., Das A.S., Dutt J.K., 2014, Vibration control of rotor shaft systems using electromagnetic actuator, Mechanisms and Machine Science, 21, DOI: 10.1007/978-3-319-06590-8 116.
• 13. Tondl A., 1965, Some Problems of Rotor Dynamics, Chapman and Hall, London.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).