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Název:
Non-linear Vibration of Planar Case of Three-blade Bundle with Dry Friction Contacts
Autoři: Šnábl, Pavel ; Pešek, Luděk ; Půst, Ladislav
Typ dokumentu: Příspěvky z konference
Konference/Akce: Computational Mechanics 2018 /34./, Srní (CZ), 20181031
Rok: 2018
Jazyk: eng
Abstrakt: Using dry friction couplings (so called tie-bosses) between the blades in turbine rotors can be used to suppress dangerous resonant vibrations of turbine blades and it has been studied on our institute on various models. Experimental setup of three-blade bundle was built along with bladed wheel. The first set-up of the bundle was with blades turned 45 degrees to the disc plane. In that case the deformation of the blades causes turning of the ends of tie-bosses and edge contact together with multi-directional slip occurs. The experimental set-up was simplified herein so that the blades are parallel to the disc plane and in-line slip occurs. Although single electromagnet was used to excite the system, the first mode of vibration with no slip in tie-bosses just occurred. In case of bladed wheel, all blades have coupling through tie-bosses with neighbouring blades which stiffen them and raise their eigenfrequency. In our case, a mistuning by reducing mass of side blades caused similar behaviour. Steel to steel contact pair was used for the first tests.
Klíčová slova: dry friction; non-linear vibration; numerical simulation; turbine blades
Číslo projektu: GA16-04546S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Computational Mechanics 2018 - Book of extended abstracts, ISBN 978-80-261-0819-1
Poznámka: Související webová stránka: https://dspace5.zcu.cz/handle/11025/30831
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0352511
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-613905
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Autoři: Šnábl, Pavel ; Pešek, Luděk ; Půst, Ladislav
Typ dokumentu: Příspěvky z konference
Konference/Akce: Computational Mechanics 2018 /34./, Srní (CZ), 20181031
Rok: 2018
Jazyk: eng
Abstrakt: Using dry friction couplings (so called tie-bosses) between the blades in turbine rotors can be used to suppress dangerous resonant vibrations of turbine blades and it has been studied on our institute on various models. Experimental setup of three-blade bundle was built along with bladed wheel. The first set-up of the bundle was with blades turned 45 degrees to the disc plane. In that case the deformation of the blades causes turning of the ends of tie-bosses and edge contact together with multi-directional slip occurs. The experimental set-up was simplified herein so that the blades are parallel to the disc plane and in-line slip occurs. Although single electromagnet was used to excite the system, the first mode of vibration with no slip in tie-bosses just occurred. In case of bladed wheel, all blades have coupling through tie-bosses with neighbouring blades which stiffen them and raise their eigenfrequency. In our case, a mistuning by reducing mass of side blades caused similar behaviour. Steel to steel contact pair was used for the first tests.
Klíčová slova: dry friction; non-linear vibration; numerical simulation; turbine blades
Číslo projektu: GA16-04546S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Computational Mechanics 2018 - Book of extended abstracts, ISBN 978-80-261-0819-1
Poznámka: Související webová stránka: https://dspace5.zcu.cz/handle/11025/30831
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0352511
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-613905
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2024-04-15, naposledy upraven 2024-04-15.