Investigations of Transient Oscillations of Rotors Supported by Magnetorheological Squeeze Film Dampers Using Bilinear Material to Model the Lubricant

0451914 - ÚT 2016 RIV CZ eng A - Abstract
Zapoměl, Jaroslav - Kozánek, Jan - Ferfecki, P.
Investigations of Transient Oscillations of Rotors Supported by Magnetorheological Squeeze Film Dampers Using Bilinear Material to Model the Lubricant.
Engineering Mechanics 2015. Praha: Institute of Theoretical and Applied Mechanics ASCR, v. v. i, 2015 - (Náprstek, J.; Fischer, C.). ISBN 978-80-86246-42-0. ISSN 1805-8248.
[Engineering Mechanics 2015. 11.05.2015-14.05.2015, Svratka]
R&D Projects: GA ČR GA15-06621S
Institutional support: RVO:61388998
Keywords : magnetorheological squeeze film damper * magnetorheological oil * bilinear material * rotordynamics.
Subject RIV: BI - Acoustics

Magnetorheological squeeze film dampers are added to the rotor supports to reduce lateral vibrations of rotating machines with the possibility to control the damping effect. In mathematical models magnetorheological oils are usually represented by Bingham or Herschel-Bulkley theoretical materials. Here the magnetorheological oil is modelled by bilinear material with the yielding shear stress depending on magnetic induction. Its flow curve is continuous which contributes to reducing nonlinear character of the motion equations. The new mathematical model was applied to investigate several operating regimes of rotating machines.
Permanent Link: http://hdl.handle.net/11104/0255565