Coupled non-linear vibrations in multi-supported founded on slide bearings

• Autorzy: Kiciński J. , Markiewicz-Kicińska A.
• Języki publikacji: EN

Abstrakty

EN

The paper contains a study of mutual interactions, which occur between lateral, torsional and axial vibrations in multi-supported retors operating in the non-linear range. The object of investigations is a rotor founded on three slide bearings. Presented have been the methods of modelling of the rotor cracks and bearings misalingnment. These defects have been regarded as the factors generating the coupled forms of vibrations. In the work presented has been a part of work devoted to the influence of location of the angle of rotor crack on the system dynamical response. Applicability of phase vibration spectra analysis in diagnostics of such kind of defects has been indicated. The paper presents the analysis of non-linear vibrations of real rotors carried out using a 3D heat transfer model of journal bearings. The method is adequate to describe the oil film properties and enables the use of the equations of motion for the entire system and thereby the description of instability behaviour of such objects. In the work indicated are the capabilities of computer analysis in optimisation and diagnostics of technical objects such as power industry turbosystems. In the work presented is also a general discussion on the constraints emerging from modelling and mathematical description of different objects, not only of he power industry type.

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2001
• Tom: nr 108
• Strony: 47--58
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Kiciński J.

• Institute of Fluid Flow Machinery of PASci, Gdańsk, Poland

autor

Markiewicz-Kicińska A.

• Institute of Fluid Flow Machinery of PASci, Gdańsk, Poland

Bibliografia

• [1] Adams M. L., Guo J.S.: Simulations and experiments of non-linear hysteresis loop for rotor-bearing instability. IMechE Conference Transactions, Vibrations in Rotating Machinery, 1996, 309-319.
• [2] Ding J.. Krodkiewski M.: Inclusion of static indétermination in the mathematical model for non-linear dynamic analyses of multi-bearing rotor system, Journal of Sound & Vibration, 164(1993), 267-280.
• [3] Hatori H., Kawashima N.: Dynamic analysis of a rotor-journal bearing system with large dynamic loads, Japan Society of Mechanical Engineers International Journal III, 34(1991), 4, 503-511.
• [4] Khonsari M. M., Chang Y. J.: Stability boundary of non-linear orbits within clearance circle of journal bearings, Transactions of the American Society of Mechanical Engineers. Journal of Vibration and Acoustics, 115(1993), 303-307.
• [5] Kiciński J.: New method of descriptions of dynamic properiies of slide bearings, Wear, 132(1989), 205-220.
• [6] Kiciński J., Drozdowski R., Materny R: The non-linear analysis of the effect of support construction properties on the dynamic properties of multi-support rotor systems, Journal of Sound & Vibration, 206(1997), 4, 523-539.
• [7] Muszynska A., Franklin W. D.. Bently D. E.: Rotor active „anti-swirl" control, Transactions of the American Society of Mechanical Engineers, Journal of Vibration, Acoustics, Stress and Reliability in Design, 110(1988), 2, 143-150.
• [8] Kiciński J., Markiewicz A.: NLDW-70 codes for calculations of coupled forms of lateral, axial and torsional vibrations with imperfections of the type: shaft crack and elements misalignment, IFFM PAS internal report, No. 357/2000 (in Polish).
• [9] Kiciński J., Drozdowski R., Materny P.: Nonlinear model of vibration in a rotor-bearings system, Journal of Vibration and Control, 4(1998), 519-540.
• [10] Kiciński J., Haller R: Computer optimization of external fixation and initial clamping of a bushing with respect to static and dynamic properties of journal bearings, Transaction of the ASME, Vol. 116, October 1994, 690-697.