Flutter in High Aspect Ratio Wings using Numerical Continuation

Andrew Eaton; Chris Howcroft; Simon Neild; Mark Lowenberg; Jonathan Cooper; E Coetzee

Flutter in High Aspect Ratio Wings using Numerical Continuation

Andrew Eaton, Chris Howcroft, Simon Neild, Mark Lowenberg, Jonathan Cooper, E Coetzee

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Abstract

This paper presents a study into the occurrence of aeroelastic flutter in a high aspect ratio wing using numerical continuation and a geometrically nonlinear beam model. This beam model comprises a continuous, assumed-shape formulation and is coupled with strip theory aerodynamics. Out-of-plane, in-plane and torsional stiffness properties are varied and their influences on the flutter point are observed. A nonlinear lift curve is incorporated so as to illustrate the influence of stall effects. The occurrence of a subcritical Hopf bifurcation is also demonstrated, indicating the possibility of oscillation at airspeeds below the flutter velocity, given a sufficient wing perturbation.

Original language	English
Title of host publication	5th Aircraft Structural Design Conference
Publication status	Published - 4 Oct 2016

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@inproceedings{c186d821364b4628bb0f7de9be18469e,

title = "Flutter in High Aspect Ratio Wings using Numerical Continuation",

abstract = "This paper presents a study into the occurrence of aeroelastic flutter in a high aspect ratio wing using numerical continuation and a geometrically nonlinear beam model. This beam model comprises a continuous, assumed-shape formulation and is coupled with strip theory aerodynamics. Out-of-plane, in-plane and torsional stiffness properties are varied and their influences on the flutter point are observed. A nonlinear lift curve is incorporated so as to illustrate the influence of stall effects. The occurrence of a subcritical Hopf bifurcation is also demonstrated, indicating the possibility of oscillation at airspeeds below the flutter velocity, given a sufficient wing perturbation.",

author = "Andrew Eaton and Chris Howcroft and Simon Neild and Mark Lowenberg and Jonathan Cooper and E Coetzee",

year = "2016",

month = oct,

day = "4",

language = "English",

booktitle = "5th Aircraft Structural Design Conference",

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TY - GEN

T1 - Flutter in High Aspect Ratio Wings using Numerical Continuation

AU - Eaton, Andrew

AU - Howcroft, Chris

AU - Neild, Simon

AU - Lowenberg, Mark

AU - Cooper, Jonathan

AU - Coetzee, E

PY - 2016/10/4

Y1 - 2016/10/4

N2 - This paper presents a study into the occurrence of aeroelastic flutter in a high aspect ratio wing using numerical continuation and a geometrically nonlinear beam model. This beam model comprises a continuous, assumed-shape formulation and is coupled with strip theory aerodynamics. Out-of-plane, in-plane and torsional stiffness properties are varied and their influences on the flutter point are observed. A nonlinear lift curve is incorporated so as to illustrate the influence of stall effects. The occurrence of a subcritical Hopf bifurcation is also demonstrated, indicating the possibility of oscillation at airspeeds below the flutter velocity, given a sufficient wing perturbation.

AB - This paper presents a study into the occurrence of aeroelastic flutter in a high aspect ratio wing using numerical continuation and a geometrically nonlinear beam model. This beam model comprises a continuous, assumed-shape formulation and is coupled with strip theory aerodynamics. Out-of-plane, in-plane and torsional stiffness properties are varied and their influences on the flutter point are observed. A nonlinear lift curve is incorporated so as to illustrate the influence of stall effects. The occurrence of a subcritical Hopf bifurcation is also demonstrated, indicating the possibility of oscillation at airspeeds below the flutter velocity, given a sufficient wing perturbation.

M3 - Conference Contribution (Conference Proceeding)

BT - 5th Aircraft Structural Design Conference

ER -

Flutter in High Aspect Ratio Wings using Numerical Continuation

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