Aeroelastic analysis of a hingeless rotor blade in forward flight
Aeroelastic analysis of a hingeless rotor blade in forward flight
- Neue Suche nach: Jeon, S.M.
- Neue Suche nach: Lee, I.
- Neue Suche nach: Jeon, S.M.
- Neue Suche nach: Lee, I.
The aeroelastic response and stability of isotropic and composite rotor blades are investigated using a large deflection-type beam theory. The finite element equations of motion for beams undergoing arbitrary large displacements and rotations, but small strains, are obtained from Hamilton's principle. The sectional elastic constants of a composite box beam including warping deformations are determined from the refined cross-sectional finite element method. The analysis is performed for a soft-in-plane hingeless rotor in free flight propulsive trim. The nonlinear periodic blade steady response is obtained by integrating the full finite element equation in time through a coupled trim procedure with a vehicle trim. After the coupled trim response is computed, the aeroelastic response is calculated through a time-marching solution procedure under small perturbations assumption, and then the stability analysis is performed by using a moving block analysis. Numerical results of rotating natural frequencies, blade response, and aeroelastic stability are presented. The results of the full finite element analysis using the large deflection-type beam theory are quite different from those of a previously published modal analysis using the moderate deflection-type beam theory.
Dokumentinformationen
Aeroelastic analysis of a hingeless rotor blade in forward flight
Aeroelastische Analyse eines scharnierlosen Hubschrauberrotors im Vorwärtsflug
AIAA Journal ; 38 , 5 ; 843-850
2000
8 Seiten, 12 Bilder, 4 Tabellen, 40 Quellen
Aufsatz (Zeitschrift)
Englisch
Bewegungsgleichung , Eigenfrequenz , Elastizitätskonstante , Finite-Elemente-Methode , Hamilton-Theorie , isotroper Stoff , mathematisches Modell , Methodenvergleich , Modalanalyse , Neigung (Winkel) , Nichtlinearität , numerisches Verfahren , Querschnitt , Rotor (Drehflügel) , Schwingungsverhalten , Stabilitätsbedingung , statisches Verhalten , Störungsrechnung , Struktur (Werkstoff) , Verbundstoff , Verwerfung (Verformung)