Lütke, Benjamin und Schmidt, Moritz und Sinske, Julian und Neumann, Jens (2015) Structural Design of an Instrumented Double-Swept Wind Tunnel Model. In: 20th International Conference on Composite Materials. International Conference on Composite Materials, Copenhagen.
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Kurzfassung
The design of a highly instrumented, double-swept CFRP wind tunnel model and its experimental setup are presented. A forced sinusoidal pitching motion is applied to the one-sided clamped helicopter rotor blade tip. Challenges of the structural design and the manufacturing process are addressed. A mold with inserts to check the leak-tightness of the pressure transducers and retain the half shells in the mold is presented. Insights in the finite element analysis (FEA) of the blade tip model are given. The strength analysis reveals peak stresses in the adhesive and the spar. The finite element model is validated with an experimental modal analysis. The experimental and numerical mode shapes and eigenfrequencies show an excellent agreement. The design goal of a very stiff lightweight model is met with the first eigenfrequency at 70 Hz. The results of the fluid-structure interaction simulation at Ma=0.4 show no significant differences for the global forces compared to the simulations with the rigid contour. However, the maximum tip deformation is up to 20 mm and a slight excitation of the first bending mode can be observed.
elib-URL des Eintrags: | https://elib.dlr.de/100359/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Structural Design of an Instrumented Double-Swept Wind Tunnel Model | ||||||||||||||||||||
Autoren: |
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Datum: | Juli 2015 | ||||||||||||||||||||
Erschienen in: | 20th International Conference on Composite Materials | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Wind Tunnel Model, Finite Elements, Modal Analysis, Fluid-Structure Interaction Simulation, Strength Analysis, Helicopter Rotor Blade Tip | ||||||||||||||||||||
Veranstaltungstitel: | International Conference on Composite Materials | ||||||||||||||||||||
Veranstaltungsort: | Copenhagen | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||
HGF - Programmthema: | Hubschrauber | ||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||
DLR - Forschungsgebiet: | L RR - Rotorcraft Research | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Der Innovative Drehflügler (alt) | ||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aeroelastik > Aeroelastische Experimente | ||||||||||||||||||||
Hinterlegt von: | Lütke, Benjamin | ||||||||||||||||||||
Hinterlegt am: | 21 Dez 2015 15:05 | ||||||||||||||||||||
Letzte Änderung: | 31 Jul 2019 19:57 |
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