Results 181 to 190 of about 13,380 (209)

AEROELASTIC STABILITY OF SUSPENSION BRIDGES

1980
ABSTRACT An advanced theory on the aeroelastic stability of suspension bridges has been developed by taking into account the drag effects of the aerodynamically shaped decks. The theory includes both structural systems of suspension bridges, the classical system of hanging bridges and the new system of prestressed bridges.
Petre, Augustin, Sofronie, Ramiro
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Aeroelastic analysis of turbomachinery

International Journal of Numerical Methods for Heat & Fluid Flow, 2004
Summary: Part II of the two-part paper describes an aeroelastic analysis program and its application for stability computations of turbomachinery blade rows. Unsteady Euler or Navier-Stokes equations are solved on dynamically deforming, body fitted grid to obtain the aeroelastic characteristics.
Srivastava, R., Bakhle, M. A., Keith, T. G. jun., Hoyniak, D.   +3 more
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Aeroelastic Rotor Stability Analysis

1976
Abstract : This report describes an aeroelastic analysis that provides a complete description of the dynamics and aerodynamics of fully coupled helicopter main or tail rotor/airframe/control systems. The analysis is designed to study stability characteristics in conditions of pure axial flow or in forward flight, for which it computes the systems ...
S. J. Cassarino, Robert A. Johnston
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Aeroelastic Stability of the 747/0rbiter

Journal of Aircraft, 1977
A quasisteady analysis of the aeroelastic stability of the lateral (antisymmetric) modes of the 747/Orbiter vehicle demonstrates that the interference effect of the Orbiter wake on the 747 tail furnishes an aerodynamic undamping contribution to the low-frequency elastic modes.
J. Peter Reding, Lars E. Ericsson
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Aeroelastic stability of cascades in turbomachinery

Progress in Aerospace Sciences, 1994
Abstract State-of-the-art prediction of the aeroelastic stability of cascades in axial-flow turbomachines is reviewed. The first main chapter of the article presents a comprehensive formulation of the two- and three-dimensional classical (unstalled) flutter problem of tuned and mistuned rotor blade rows and bladed disc assemblies.
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Aeroelastic Stability Analysis of Supersonic Cascades

Journal of Engineering for Power, 1979
This paper presents three solutions for the analysis of supersonic flow past oscillating cascades with subsonic leading-edge locus. A quite elementary solution is first developed for the case of slowly oscillating finite and infinite flat plate cascades which provides simple analytical expressions for the unsteady pressure distributions.
J. A. Strada, W. R. Chadwick, M. F. Platzer   +2 more
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Aeromechanics and Aeroelastic Stability of Coaxial Rotors

Journal of Aircraft, 2021
Coaxial rotor aeroelasticity is complex due to the counter-rotating wake system, rotor lift offset, periodic blade passage loads, unsteady rotor wake interactions, reduced rotor speed, and stiff hi...
Puneet Singh, Peretz P. Friedmann
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Aeroelastic Stability Characteristics of an Oblique-Wing Aircraft

Journal of Aircraft, 1977
Two different studies are presented involving a transport category aircraft with an oblique or asymmetrically swept wing. The first study concerns itself with the effect on flutter of changes in certain of the aircraft structural and inertial parameters.
J. CRITTENDEN, T. WEISSHAAR, E. JOHNSON, M. RUTKOWSKI   +3 more
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Stability analysis of aeroelastic systems based on aeroelastic FRF and condition number

Aircraft Engineering and Aerospace Technology, 2012
Purpose – The purpose of this paper is to analyze the stability of aeroelastic systems using aeroelastic frequency response function (FRF).Design/methodology/approach – The proposed technique determines the instability boundary of an aeroelastic system based on condition number (CN) of aeroelastic FRF matrix or directly from FRFs data.Findings ...
A.S. Roknizadeh, A.S. Nobari, M. Mohagheghi, H. Shahverdi   +3 more
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Aeroelastic stability of slender, spinning missiles

16th Atmospheric Flight Mechanics Conference, 1989
The coupled equations of motion that govern the static and dynamic aeroelastic stability of spinning, flexible missiles are derived. A Lagrangian approach is employed which results in nonlinear coupling between the elastic deflections and the rigid-body motion parameters.
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