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

0549616 - ÚT 2022 RIV DE eng C - Konferenční příspěvek (zahraniční konf.)
Šnábl, Pavel - Půst, Ladislav - Pešek, Luděk
Self-excited vibrations of bladed wheel analytical model with nozzle excitation and dry friction damping.
14th International Conference on Vibration Problems, ICOVP 2019. Vol. 58. Heidelberg: Springer, 2021 - (Sapountzakis, E.; Biswas, P.; Banerjee, M.; Inan, E.), s. 353-366. Lecture Notes in Mechanical Engineering, 58. ISBN 978-98-115-8048-2. ISSN 2195-4356.
[International conference on vibration problems. ICOVP 2019 /14./. Hersonissos (GR), 01.09.2019-04.09.2019]
Grant CEP: GA TA ČR(CZ) TN01000007
Institucionální podpora: RVO:61388998
Klíčová slova: bladed wheel vibrations * dry friction damping * self-excitation * Van der Pol model
Obor OECD: Applied mechanics
https://link.springer.com/chapter/10.1007%2F978-981-15-8049-9_21

In this contribution, a bladed wheel with dry friction couplings in tie bosses between neighbouring blades is studied. Bladed wheel is excited by stator nozzle excitation in addition to aeroelastic self-excitation modelled by Van der Pol model. Two types of self-excitation are studied, the first 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.
Trvalý link: http://hdl.handle.net/11104/0327455