Kinematically Excited Vibration of an Asymmetric Rotor/Bearing System With Magnetic Lubricant

• Autorzy: Perek A. , Kurnik W.
• Języki publikacji: EN

Abstrakty

EN

The paper is concerned with transverse dynamics of a rigid rotor supported in a semi-active slide bearing lubricated with a magnetic fluid. Attention is focused on modeling and simulation of forced vibrations of an asymmetric rotor supported in a rolling bearing at one end and in a slide bearing, on the other one. The slide bearing is treated as a nonlinear flexible support with visco-elastic properties controlled by an external magnetic field via a ferrofluid used as a bearing lubricant. The considered dynamical system is a discrete model of real rotor of Rotor Kit RK-4 by Bentley Nevada, a laboratory device being used for educational and research purposes. The aim of the study is to find how a magnetically induced modification of the magnetic fluid affects the resonant behavior of the rotor under harmonic kinematic excitation by the rotor housing movement. Computer simulations are used to obtain resonant curves of nonlinear relative rotor/housing vibrations. The effects of magnetically controlled viscosity of the lubricant fluid are presented as changes of shape and maximum values of the resonant curves as well as a shift of the resonance zone in the excitation frequency domain.

Słowa kluczowe

EN

rigid rotor; slide bearing; magnetic fluid; resonant vibration; kinematic excitation

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2015
• Tom: Vol. 39, No. 4
• Strony: 5--19
• Opis fizyczny: Bibliogr. 9 poz., wykr.

Twórcy

autor

Perek A.

• Warsaw University of Technology

autor

Kurnik W.

• Warsaw University of Technology

Bibliografia

• 1. Bajer, C.I. and Dyniewicz, B. and Pisarski, D. and Bajkowski, J.M. (2015). Vibration control with smart materials. IPPT PAN, pages 1–240.
• 2. Bajkowski, J. (2014). Magneto-rheological fluids and dampers, Original title in Polish: Ciecze i tłumiki magnetoreologiczne. Wydawnictwa Komunikacji i Łączności, Warszawa.
• 3. Berkovsky, B.M. and Medvedev, V.F. and Krakov, M.S. (1993). Magnetic Fluids Engineering Applications. Oxford University Press.
• 4. Kurnik, W. and Perek, A. (2013). Vibration control of a rotor/bearing system via magnetic fluid as a lubricant. 8th German-Greek-Polish Symposium on Recent Advances in Mechanics. Book of Abstracts, Goslar, Germany.
• 5. Kurnik,W. and Starczewski, Z. (1998). Reduction of vibration of rigid rotors with slide bearings. Damping of Vibrations, A.A. Balkema, pages 423–448. Z. Osiński Ed.
• 6. Miszczak, A. (2006). Analysis of hydrodynamic lubrication of transverse slide bearings with ferrofluids, Original title in Polish: Analiza hydrodynamicznego smarowania ferrociecza˛ poprzecznych łożysk ślizgowych. Foundation for Development of Marine Academy, Gdynia.
• 7. Odenbach, S. (2002). Ferrofluids. Magnetically Controllable Fluids and Their Applications. Springer.
• 8. Tipei, N. (1982). Theory of lubrication with ferrofluid: application to short bearings. Transactions of the ASME, 104:510–515.
• 9. Zubarev, A.Yu. and Chirikov, D.N. (2010). On the theory of the magnetoviscous effect in ferrofluids. Journal of Experimental and Theoretical Physics, 110(6):995–1004.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.