NDLI: Effect of chordwise forces and deformations and deformations due to steady lift on wing flutter

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Effect of chordwise forces and deformations and deformations due to steady lift on wing flutter

Content Provider	NASA Technical Reports Server (NTRS)
Author	Boyd, W. N.
Copyright Year	1977
Description	This investigation explores the effects of chordwise forces and deformations and steady-state deformation due to lift on the static and dynamic aeroelastic stability of a uniform cantilever wing. Results of this analysis are believed to have practical applications for high-performance sailplanes and certain RPV's. The airfoil cross section is assumed to be symmetric and camber bending is neglected. Motions in vertical bending, fore-and-aft bending, and torsion are considered. A differential equation model is developed, which included the nonlinear elastic bending-torsion coupling that accompanies even moderate deflections. A linearized expansion in small time-dependent deflections is made about a steady flight condition. The stability determinant of the linearized system then contains coefficients that depend on steady displacements. Loads derived from two-dimensional incompressible aerodynamic theory are used to obtain the majority of the results, but cases using three-dimensional subsonic compressible theory are also studied. The stability analysis is carried out in terms of the dynamically uncoupled natural modes of vibration of the uniform cantilever.
File Size	6311184
Page Count	260
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19780021167
Archival Resource Key	ark:/13960/t6644jb1s
Language	English
Publisher Date	1977-12-01
Access Restriction	Open
Subject Keyword	Aircraft Stability And Control Dynamic Response Stress Analysis Wings Elastic Bending Deformation Flutter Aerodynamic Stability Aeroelasticity Leading Edges Lift Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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