1–20 von 275 Ergebnissen
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    X-31A flight flutter test excitation by control surfaces

    Hodson, C.H. / Dobbs, S.K. / Brosman, M.J. et al. | Tema Archiv | 1993
    frequencies and damping versus dynamic pressure and mach number extracted from the response data are given. The required structural modes were ...

    Wing-tail interaction flutter revisited

    Yurkovich, R. | Tema Archiv | 1996
    . In this case the flap provides the downwash necessary for the aerodynamic coupling between the wing and the horizontal tail. In the earlier ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston
    Schlagwörter: Dynamik

    Wing flutter boundary prediction using unsteady Euler aerodynamic method

    Lee-Rausch, E.M. / Batina, J.T. | Tema Archiv | 1993
    algorithm and the addition of the structural equations of motion for their simultaneous time-integration with the governing flow equations. The ...

    Vibration reduction in hingeless rotors using an actively controlled trailing edge flap: implementation and time domain simulation

    Millott, T.A. / Freiedmann, P.P. | Tema Archiv | 1994
    effectiveness and power efficiency of the ACF, but at the cost of slightly higher input angles. Trend studies show that the torsional stiffness of the ...

    Vibration reduction in helicopter rotors using an active control surface located on the blade

    Millott, T.A. / Friedmann, P.P. | Tema Archiv | 1992
    spring restrained model of the blade is used with fully coupled flap-lag-torsional dynamics for each blade. The rotor trim and blade response are ...

    Vibration of adaptive wing-rotor system for tiltrotor aircraft application

    Song, Ohseop / Kwon, Hyuck-Dong / Librescu, L. | Tema Archiv | 2000
    constituent materials, transverse shear, rotatory inertias. In addition, the gyroscpic effects, spin rate and tilt angle of the spinning rotor are ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston

    Vibration and flutter of stiff-inplane elastically tailored composite rotor blades

    Smith, E.C. | Tema Archiv | 1993
    Aeroelastic response, blade and hub loads, and shaft-fixed aeroelastic stability is investigated for a helicopter with elastically tailored ...

    Variable stiffness spar wind-tunnel model development and testing

    Florance, James R. / Heeg, Jennifer / Spain, Charles V. et al. | Tema Archiv | 2004
    control surfaces and by varying wing structural stiffness via a Variable Stiffness Spar (VSS) mechanism. High design loads compromised the VSS ...

    Unsteady transonic potential flow over a flexible fuselage

    Gibbons, M.D. | Tema Archiv | 1993
    A flexible fuselage capability has been developed and implemented within version 1.2 of the CAP-TSD code. The capability required adding ...

    Unsteady aerodynamics of a flapped airfoil in subsonic flow by indicial concepts

    Hariharan, N. / Leishman, J.G. | Tema Archiv | 1995
    An approach, based on the indicial method, is described for computing the unsteady lift, pitching moment, hinge moment and the drag on a ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Washington

    Unsteady aerodynamics and flutter of propfans using a three-dimensional full-potential solver

    Bakhle, M.A. / Reddy, T.S. | Tema Archiv | 1993
    A full-potential solver coupled with a linear structural dynamics model is used to calculate the unsteady aerodynamics and aeroelasticity ...

    U-groove aluminum weld strength improvement

    Verderaime, V. / Vaughan, R. | Tema Archiv | 1996
    generally the least understood. This study investigated experimental strain distributions across a thick aluminum U-grooved weld and identified two ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Reston

    Transonic limit cycle flutter of high-aspect-ratio swept wings

    Bendiksen, Oddvar O. | Tema Archiv | 2006
    structural washout and is present in the first bending mode that enters LCO flutter. The aeroelastic washout effect may produce counterintuitive ...

    Transient moisture concentration profiles and hygroscopic stress fields in an asbestos phenolic nozzle liner

    Nguyen, T.V. / Mah, C.S. / Bhe, S.T. | Tema Archiv | 1995
    were generated on moisture absorption rates and dimensional changes due to changes in the amount of moisture absorbed. The experimental data ...
    Verlag: American Institute of Aeronautics and Astronautics (AIAA) , Washington

    Trailing edge flap control methodology for vibration reduction of helicopter with dissimilar blades

    Roget, B. / Chopra, I. / Gessow, A. | Tema Archiv | 2001
    the proposed methodology lies in its ability to control each rotor blade separately and optimally taking into account blade-to-blade ...

    Time domain damping identification in helicopter rotor systems

    Zhao, Y. / Wereley, N.M. | Tema Archiv | 2001
    Accurate and reliable damping identification techniques are needed to assess stability margin with the development of advanced rotor ...

    The use of artificial intelligence for buffet environments

    Jacobs, J.H. / Hedgecock, C.E. / Pado, L.E. et al. | Tema Archiv | 1993
    Cooperative experimental and analytical research between McDonnell Douglas Aerospace (MDA) and NASA Langley Research Center (NASA LaRC) has ...

    The role of structural health monitoring for future air vehicles

    Derriso, Mark M. / Olson, Steven E. | Tema Archiv | 2006
    vehicle systems, which are likely to include advanced materials and advanced structural concepts. Composite materials are expected to be used ...

    The role of Kutta waves on oscillatory shock motion on an airfoil experiencing heavy buffeting

    Lee, B.H. / Murty, H. / Jiang, H. | Tema Archiv | 1993
    various airfoil geometries and free stream Mach numbers. The results are compared to those obtained from an empirical formulation given by ...

    The role of buffeting the structural design of eurofighter

    Becker, J. / Luber, W. | Tema Archiv | 2003
    The application of buffet loads in the design of military aircraft structures are discussed and results from special detailed ...