Title: Investigation of the effect of controllable dampers on limit states of rotor systems
Authors: Zapomněl, Jaroslav
Ferfecki, Petr
Liberdová, Jana
Citation: Applied and Computational Mechanics. 2012, vol. 6, no. 1, p. 119-132.
Issue Date: 2012
Publisher: University of West Bohemia
Document type: článek
URI: http://www.kme.zcu.cz/acm/index.php/acm/article/view/165/164
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: rotory;kontrolované tlumení;mezní stavy;únavové selhání
Keywords in different language: rotors;controllable damping;limit states;fatigue failure
Abstract: The unbalance and time varying loading are the principal sources of lateral vibrations of rotors and of increase of forces transmitted through the coupling elements into the stationary part. These oscillations and force effects can be considerably reduced if damping devices are added to the coupling elements placed between the rotor and its casing. The theoretical studies and practical experience show that to achieve their optimum performance their damping effect must be controllable. This article focuses on investigation of influence of controlled damping in the rotor supports on its limit state of deformation, fatigue failure and on magnitude of the forces transmitted into the stationary part. The analysed system is a flexible rotor with one disc driven by an electric DC motor and loaded by the disc unbalance and by technological forces depending on the rotor angular position. In the computational model the system vibration is governed by a set of nonlinear differential equations of the first and second orders. To evaluate the fatigue failure both the flexural and torsional oscillations are taken into account. The analysis is aimed at searching for the intervals of angular speeds, at which the rotor can be operated without exceeding the limit states.
Rights: © 2012 University of West Bohemia. All rights reserved.
Appears in Collections:Volume 6, number 1 (2012)
Volume 6, number 1 (2012)

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