Stabilization of a Rotor with Internal Friction by a Helical Damper Strip

• Autorzy: Brommundt E.
• Konferencja: Polish-German Workshop on Dynamical Problems in Mechanical Systems (9 ; 4-10.09.2005 ; Paszkówka, Poland)
• Języki publikacji: EN

Abstrakty

EN

The damper strip consists of a visco-elastic material which contains at its upper side, inlayed, several wires which are inextensible compared to the matrix. The strip is helically wound around and attached to the surface of the shaft. The influence of this device to the oscillations of a simple overhung rotor is investigated. Seen from a rotating frame, the equations of motion contain coefficients which are periodical with respect to the longitudinal coordinate of the shaft (but do not depend explicitly on the time). Numerical evaluations of the equations show that, depending on the parameters especially the pitch, there are regions of stable stationary operation at speeds well above the natural frequencies. Thus, the destabilizing effects of internal damping can be overcome selectively.

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Problems
• Rocznik: 2005
• Tom: Vol. 29, No. 4
• Strony: 21--46
• Opis fizyczny: Bibliogr. 4 poz., rys.,

Twórcy

autor

Brommundt E.

• Technical University of Braunschweig, Institute of Dynamics and Vibrations,

Bibliografia

• 1. Brommundt, E., 1993, Beschreibung von Kreiselbewegungen mit Hilfe von Kippwinkeln, ZAMM 73, 9, 229-230.
• 2. Gasch, R., Nordmann, R., Pfützner, H., 2002, Rotordynamik, 2. Auflage, Springer, Berlin etc.
• 3. Lanczos, C., 1966, The Variational Principles of Mechanics, 3rd edition, University of Toronto Press, Toronto.
• 4. Tondl, A., 1965, Some Problems of Rotor Dynamics, Publishing House of the Czechoslovak Academy of Sciences, Prague, and Chapman & Hall, London.