University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Modeling of Nonlinear Flexible Aircraft Dynamics Including Free-Wake Effects

Murua, J, Palacios, R and Graham, JMR (2010) Modeling of Nonlinear Flexible Aircraft Dynamics Including Free-Wake Effects In: AIAA Atmospheric Flight Mechanics., 2010-08-02 - 2010-08-05, Toronto, ON, Canada.

[img] PDF (licence)
SRI_deposit_agreement.pdf
Restricted to Repository staff only

Download (33kB)
[img] PDF (deleted)
2010_08 AFM-2010-8226.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (572kB)
[img] PDF
C02 Murua, Palacios & Graham (AFM-2010-8226) Modeling of nonlinear flexible aircraft dynamics including free-wake effects.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (572kB)

Abstract

This paper addresses the unified aeroelastic and flight dynamics characterization of low-speed slender-wing aircraft, including free-wake effects and aerodynamic interference. An analysis framework is presented that targets the prediction of stability and handling qualities of high-altitude long-endurance vehicles, which are prone to experience large wing excursions, leading to an inherently nonlinear and coupled problem between aerodynamics, elasticity and flight dynamics. In this work, the structural dynamics are based on a geometrically-exact composite beam model, discretized using displacement-based finite elements, and cast into an extended flexible-body dynamics model. The aerodynamic model is defined by a general unsteady vortex lattice method. The governing equations of motion of the integrated system are formulated in a tightly-coupled state-space form, which allows for the equations to be solved simultaneously. Verification of the model has been carried out for static and dynamic problems, including both rigid and flexible wings. Numerical studies are presented for the particular case of prescribed rigid-body motions, paying special attention to the likely interference between wake and tail. Results show that the current approach represents a suitable alternative for configuration analysis of flexible atmospheric vehicles, offering a good balance between degree of fidelity and computational cost.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
AuthorsEmailORCID
Murua, JUNSPECIFIEDUNSPECIFIED
Palacios, RUNSPECIFIEDUNSPECIFIED
Graham, JMRUNSPECIFIEDUNSPECIFIED
Date : 4 August 2010
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 14:08
Last Modified : 28 Mar 2017 14:08
URI: http://epubs.surrey.ac.uk/id/eprint/714252

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800