0381562 - ÚT 2013 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Pešek, Luděk - Půst, Ladislav - Bula, Vítězslav - Vaněk, František - Cibulka, Jan
Inter-slip damping of twisted blades in opposed bundles under rotation.
10th International Conference on Vibrations in Rotating Machinery. London: Institution of Mechanical Engineers, 2012, s. 293-302. ISBN 978-0-85709-452-0.
[International conference on Vibrations in Rotating Machinery /10./. London (GB), 11.09.2012-13.09.2012]
Grant CEP: GA ČR GA101/09/1166
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: dry-friction * damping * bladed wheel
Kód oboru RIV: BI - Akustika a kmity

This paper presents the numerical and experimental solutions of inter-slip damping of twisted blades in opposed bundles. The numerical approach is based on a space finite element model which presents three twisted blades connected by dry friction couplings in their heads. The couplings are considered to be surface-to-surface contacts with friction. The damping effect is evaluated from the free attenuation after a resonant vibration. The resonant vibration of the blades was excited by pulses of a single electromagnet during the experiment. The responses of the blades were measured by strain-gauges with a slip-ring signal transmission at rotation. The dynamic behaviour of the blades and the results of damping are in a good accordance with the numerical modelling.
Trvalý link: http://hdl.handle.net/11104/0212004