Original title: Excitation of rotating disk by stationary permanent magnets
Authors: Půst, Ladislav ; Pešek, Luděk
Document type: Papers
Conference/Event: Engineering Mechanics 2011 /17./, Svratka (CZ), 2011-05-09 / 2011-05-12
Year: 2011
Language: eng
Abstract: Abstract: Flexural vibrations of rotating disk contain forward and backward traveling waves can be excited at certain speed of rotating disk also by a standing constant single point force or by multiple points standing forces, realized e.g. by permanent magnets fixed in non-rotating space. Presented paper is contribution to the theoretical background of a new experimental excitation technique elaborated in Institute of Thermomechanics for investigation of a bladed turbine disk model with imperfection by addition several damping heads on ends of blades. Mathematical model of imperfect rotating disk was derived by using data gained experimentally and by FE computed for three lowest split modes of vibrations. It was shown how either the whole spectrum of modes of vibrations can be recorded or some resonance of selected mode can be suppressed on emphasized by means of appropriate number and positions of permanent magnets.
Keywords: constant force excitation; resonance suppression; rotating disk; traveling backwards waves
Project no.: CEZ:AV0Z20760514 (CEP), GA101/09/1166 (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2011, ISBN 978-80-87012-33-8

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0197335

Permalink: http://www.nusl.cz/ntk/nusl-55726


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers