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Model reduction for linear and nonlinear gust loads analysis

Model reduction for linear and nonlinear gust loads analysis
Model reduction for linear and nonlinear gust loads analysis
Time domain gust response analysis based on large-order nonlinear aeroelastic models is computationally expensive. An approach to the reduction of nonlinear models for gust loads prediction is presented in this paper. The method uses information on the eigenspectrum of the coupled system Jacobian matrix and projects the full order model through a series expansion onto a small basis of eigenvectors which is capable of representing the full order model dynamics. Linear and nonlinear reduced models derived from computational fluid dynamics and linear/nonlinear structural models are generated in this way. The novelty in the paper concerns the representation of the gust term in the reduced model in a manner consistent with standard synthetic gust definitions, allowing a systematic investigation of the influence of a large number of gusts without regenerating the reduced model. The methodology is illustrated by results for an aerofoil, with a combination of linear and nonlinear structural and aerodynamic models used, and a wing model with modal structural model.
978-1-62410-223-3
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Tantaroudas, N. D.
12303349-1026-48e8-ba09-8c4d59f65d43
Timme, S.
d688c7f1-3a3d-44e0-ad8c-15f350c91ff8
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Tantaroudas, N. D.
12303349-1026-48e8-ba09-8c4d59f65d43
Timme, S.
d688c7f1-3a3d-44e0-ad8c-15f350c91ff8
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef

Da Ronch, A., Tantaroudas, N. D., Timme, S. and Badcock, K. J. (2013) Model reduction for linear and nonlinear gust loads analysis. 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, United States. 07 - 10 Apr 2013. 18 pp . (doi:10.2514/6.2013-1492).

Record type: Conference or Workshop Item (Paper)

Abstract

Time domain gust response analysis based on large-order nonlinear aeroelastic models is computationally expensive. An approach to the reduction of nonlinear models for gust loads prediction is presented in this paper. The method uses information on the eigenspectrum of the coupled system Jacobian matrix and projects the full order model through a series expansion onto a small basis of eigenvectors which is capable of representing the full order model dynamics. Linear and nonlinear reduced models derived from computational fluid dynamics and linear/nonlinear structural models are generated in this way. The novelty in the paper concerns the representation of the gust term in the reduced model in a manner consistent with standard synthetic gust definitions, allowing a systematic investigation of the influence of a large number of gusts without regenerating the reduced model. The methodology is illustrated by results for an aerofoil, with a combination of linear and nonlinear structural and aerodynamic models used, and a wing model with modal structural model.

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More information

Published date: 8 April 2013
Venue - Dates: 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, United States, 2013-04-07 - 2013-04-10
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 351936
URI: http://eprints.soton.ac.uk/id/eprint/351936
ISBN: 978-1-62410-223-3
PURE UUID: f4c1abd8-a41b-4ad5-ab23-cee072db1780

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Date deposited: 07 May 2013 09:01
Last modified: 20 Nov 2021 14:35

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Contributors

Author: A. Da Ronch
Author: N. D. Tantaroudas
Author: S. Timme
Author: K. J. Badcock

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