PORTO @ 
Archivio Istituzionale della Ricerca
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishUnder-platform damper is used to attenuate resonant response and further prevent high cycle fatigue failure of turbine blades. The aim of this work is to improve the representation of contact interfaces in modeling an asymmetrical under-platform damper. A new reduced-order contact model with a lumped parameter form is proposed, which is based on a modification of the classical Iwan model. This model can explicitly consider the normal contact pressure on line contact. In modeling process, a method to relate the physical Hertzian normal contact pressure with the probability density function (PDF) of slider sliding force for continuous Iwan model is developed. Experimental results from a laboratory asymmetrical under-platform damper test rig are employed to validate the proposed model. For comparison, different normal contact pressure distributions are considered. The out-of-phase motion of the damper is numerically investigated, and the results show that the proposed model can give an accurate prediction of the damper’s nonlinear mechanics behavior.
Reduced-Order Modeling Friction for Line Contact in a Turbine Blade Damper System / Li, Dongwu; Xu, Chao; Gola, Muzio; Botto, Daniele. - ELETTRONICO. - 2(2020), pp. 197-205. [10.1007/978-3-030-34747-5]
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Reduced-Order Modeling Friction for Line Contact in a Turbine Blade Damper System | |
| Autori: | ||
| Data di pubblicazione: | 2020 | |
| Titolo del libro: | Nonlinear Dynamics and Control | |
| Abstract: | Under-platform damper is used to attenuate resonant response and further prevent high cycle fatig...ue failure of turbine blades. The aim of this work is to improve the representation of contact interfaces in modeling an asymmetrical under-platform damper. A new reduced-order contact model with a lumped parameter form is proposed, which is based on a modification of the classical Iwan model. This model can explicitly consider the normal contact pressure on line contact. In modeling process, a method to relate the physical Hertzian normal contact pressure with the probability density function (PDF) of slider sliding force for continuous Iwan model is developed. Experimental results from a laboratory asymmetrical under-platform damper test rig are employed to validate the proposed model. For comparison, different normal contact pressure distributions are considered. The out-of-phase motion of the damper is numerically investigated, and the results show that the proposed model can give an accurate prediction of the damper’s nonlinear mechanics behavior. | |
| ISBN: | 978-3-030-34746-8 978-3-030-34747-5 | |
| Appare nelle tipologie: | 2.1 Contributo in volume (Capitolo o Saggio) |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| NODYCON2019_paper_336_PostPrint.pdf | Capitolo | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
| NODYCON.pdf | Capitolo | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2819912
Copyright © 2021