The effectiveness of rigid rotor's balance with resonant extortion of the system with small damping

• Autorzy: Zachwieja J. , Holka H.
• Języki publikacji: EN

Abstrakty

EN

The thesis refers to the previous researches of the authors of the dynamics of rigid rotor placed on favourable ground. Such systems are characterized by usually low frequency of normal mode vibrations which causes real danger that they can work in the resonant region or cross this region every time during acceleration or start. The amplitude of rotor's vibrations with small internal damping reaches then high values. The factor of damping for the system with small mass may be defined on the basis of the character of its response to pulse extortion. The way how to determine the value of rotor's damping useful for the numerical analysis of its vibration was presented. The thesis presents also the results of the researches of the effectiveness of disk balance with circum-resonant speed in the situations when only unbalanced force affects the rotor and when vibrations of the foundation are caused by the external resonant induction.

Słowa kluczowe

EN

rigid rotor balancing natural frequencies vibrations

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2011
• Tom: Vol. 6, no 1
• Strony: 211--221
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Zachwieja J.

autor

Holka H.

• University of Technology and Life Sciences in Bydgoszcz ul. S. Kaliskiego 7, 85-789 Bydgoszcz, Polska,

Bibliografia

• [1] Holka H., Effect of support structure receptance on mechanism operation. Developments in Machinery Design and Control 1, 41-49. 2005.
• [2] Zachwieja J., Gołębiowska I., Damping of structures free vibrations based on the example of steel structure of separator’s foundation. Developments in Machinery Design and Control – Nowogród. 2008.
• [3] Zachwieja J., Peszyński K., Vibroisolators application for damping vibtations in industrial fans. National Conference with International Participations – Engineering Mechanics Svratka Czech Republic. 2008.
• [4] Zachwieja J., Diagnozowanie procesu odprężania wibracyjnego konstrukcji stalowych w celu doboru optymalnych parametrów technologicznych, Elementy diagnostyki maszyn roboczych i pojazdów, 283-294. 2009.
• [5] Holka H., Nieckarz M., Usuwanie naprężeń spawalniczych w stalowych konstrukcjach metodami wibracyjnymi. Postępy w sterowaniu i konstrukcji – Bydgoszcz 2001.
• [6] Zachwieja J., Numerical modelling of vibrations of machine foundations with percussive characteristics of work. Developments in Machinery Design and Control 5, 83-96. 2007.
• [7] Muszyńska A., Rotordynamics. John Wiley & Sons Inc. 2005.
• [8] Kang Y., Liu C.P., Sheen G., A modified influence coefficient method for balancing unsymmetrical rotor-bearing systems. Journal of Sound and Vibration 194(2), 199-218. 1996.
• [9] Lees A. W., Friswell M. I., The evaluation of rotor unbalance in flexibly mounted machines. Journal of Sound and Vibration 208, 671-683. 1997.
• [10] Genta G., Whirling of unsymmetrical rotors: A finite element approach based on complex coordinates. Journal of Sound and Vibrations 124(1), 27-53. 1988.