Weiß, Felix Armin und Keßler, Christoph (2021) Load prediction of hingeless helicopter rotors including drivetrain dynamics. CEAS Aeronautical Journal, 12 (2), Seiten 215-231. Springer. doi: 10.1007/s13272-020-00483-6. ISSN 1869-5590.
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Offizielle URL: https://link.springer.com/10.1007/s13272-020-00483-6
Kurzfassung
Structural couplings between the flexible main rotor and the flexible drivetrain of the Bo105 helicopter are investigated by numerical simulation. For this purpose, the rotor hub constraint Omega = const. is dropped and a drivetrain model, consisting of discrete inertia elements and intermediate flexible elements, is connected to the hub. By use of the multibody-software SIMPACK, the coupled rotor-drivetrain system is linearized and the eigenmodes are compared to those obtained with a constrained rotor hub. The drivetrain has a significant influence on the shapes and eigenfrequencies of the collective lead-lag modes. While the first collective lead-lag eigenfrequency is raised by the finite drivetrain inertia, the second is lowered due to drivetrain flexibility. To assess the influence of modeling inaccuracies on the observed couplings, the study is complemented by a sensitivity analysis. Rotor blade mass axis offset, blade pitch (causing elastic coupling) and blade precone angle have only weak influence on the coupled modes. In contrast, variations of drivetrain inertia and stiffness strongly affect the eigenfrequencies of the coupled rotor-drivetrain modes.
elib-URL des Eintrags: | https://elib.dlr.de/135614/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | Load prediction of hingeless helicopter rotors including drivetrain dynamics | ||||||||||||
Autoren: |
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Datum: | 3 Februar 2021 | ||||||||||||
Erschienen in: | CEAS Aeronautical Journal | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Band: | 12 | ||||||||||||
DOI: | 10.1007/s13272-020-00483-6 | ||||||||||||
Seitenbereich: | Seiten 215-231 | ||||||||||||
Verlag: | Springer | ||||||||||||
ISSN: | 1869-5590 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Rotor dynamics, Lead-lag motion, Drivetrain, Coupled modes, Mode shapes, Eigenfrequencies | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Effizientes Luftfahrzeug | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L EV - Effizientes Luftfahrzeug | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtueller Hubschrauber und Validierung | ||||||||||||
Standort: | Braunschweig | ||||||||||||
Institute & Einrichtungen: | Institut für Flugsystemtechnik Institut für Flugsystemtechnik > Hubschrauber | ||||||||||||
Hinterlegt von: | Weiß, Felix Armin | ||||||||||||
Hinterlegt am: | 18 Aug 2021 14:49 | ||||||||||||
Letzte Änderung: | 19 Aug 2021 11:30 |
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