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- Title
Minimizing the vibration amplitude of rotating machinery running through the resonance area by application of magnetorheological squeeze film dampers.
- Authors
Zapoměl, Jaroslav; Ferfecki, Petr; Kozánek, Jan
- Abstract
The unbalance of rotating machines excites their lateral vibration that can become excessive in the vicinity of the critical speeds. Placing magnetorheological dampers to the rotor supports is a possible technological solution for reducing its amplitude. Both the analytical studies and practical experience show that behaviour of these damping elements is strongly nonlinear. A novel mathematical model of a magnetorheological squeeze film damper has been developed on the assumptions of the classical theory of lubrication, except that for the lubricant. The magnetorheological oil is represented by a bilinear material, the yielding shear stress of which depends on magnetic induction. The simulation results show that a right control of the damping force arrives at significant reduction of the vibration amplitude. The development and application of a new model of a magnetorheological squeeze film damper and confirmation of its efficiency and computational stability are the principal contributions of this article.
- Subjects
ROTATING machinery; VIBRATION (Mechanics); RESONANCE; MAGNETORHEOLOGICAL dampers; SQUEEZE films (Coatings)
- Publication
Vibroengineering Procedia, 2016, Vol 8, p68
- ISSN
2345-0533
- Publication type
Article