Self-excited vibrations of bladed wheel analytical model with nozzle excitation and dry friction damping

0509107 - ÚT 2020 GR eng C - Conference Paper (international conference)
Šnábl, Pavel - Půst, Ladislav - Pešek, Luděk
Self-excited vibrations of bladed wheel analytical model with nozzle excitation and dry friction damping.
ICOVP 2019. Atény: National Technical University of Athens, 2019 - (Sapountzakis, E.), s. 1-14
[ICOVP 2019. Kréta (GR), 01.09.2019-04.09.2019]
Institutional support: RVO:61388998
Keywords : bladed wheel vibrations * dry friction damping * self-excitation
OECD category: Applied mechanics

In this contribution a a bladed wheel with dry friction couplingsin tie-bosses between neighbouring blades is studied. Bladed wheel is excited by stator nozzle excitation in addition with aero-elastic selfexcitation modelled by Van der Pol model. Two types of self-excitation are studied, the rst is dependent on absolute motion of each blade, the second on relative motions between neighbouring blade pairs. Results of simulations are shown for both cases for various number of stator blades
and friction forces in tie-boss contacts. Damping ability of those contacts are compared.
Permanent Link: http://hdl.handle.net/11104/0302581