Phase delayed excitation of turbine blades couple with friction

0383350 - ÚT 2013 RIV CZ eng A - Abstract
Půst, Ladislav - Pešek, Luděk
Phase delayed excitation of turbine blades couple with friction.
Computational mechanics 2012. Plzeň: University of West Bohemia, 2012 - (Adámek, V.; Zajíček, M.; Jonášová, A.). s. 1-2. ISBN 978-80-261-0157-4.
[Computational mechanics 2012 /28./. 12.11.2012-14.11.2012, Špičák]
R&D Projects: GA ČR GA101/09/1166
Institutional research plan: CEZ:AV0Z20760514
Keywords : couple of blades * friction connection * reduction of vibration
Subject RIV: BI - Acoustics

Model of blade couple connected by a friction contact was investigated in the first resonance frequency range. On the contrary to the previous study, where only one harmonic force excites the couple, two forces with mutual time delay were used. It is shown that this delay is proportional to the ratio of stator and rotor blade numbers. The reduction of resonance vibrations realized by means of friction between the blade-heads increases roughly proportional to the difference of stator and rotor blade numbers.
Permanent Link: http://hdl.handle.net/11104/0007214