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Efficient aeroelastic reduced order model with global structural modifications

Efficient aeroelastic reduced order model with global structural modifications
Efficient aeroelastic reduced order model with global structural modifications
Time domain aeroelastic analysis has high computing costs when using computational fluid dynamics. These costs become prohibitive when the structural model undergoes large changes from the baseline design, as within an aircraft design process. To overcome this realistic challenge, we have developed, implemented, and demonstrated an efficient method that is robust in the presence of global modifications of the structure. The method consists of: a) a reduced order model of the linearized Navier-Stokes equations generated around an aeroelastic equilibrium that depends, in turn, on the structural model; b) an approximate structural dynamic reanalysis method valid for global modifications of the structure; and c) a mechanism to exchange information between fluid and structural solvers without need for calculating at each iteration of the structural design an eigenvalue problem of the modified structure. The resulting aeroelastic reduced order model is demonstrated for the AGARD 445.6 wing, and material properties are varied up to 100% from their original values. It is found that: a) predictions of the time domain aeroelastic response and of the flutter speed are accurate for all modifications of the structure; and b) the computational efficiency of the proposed aeroelastic reduced order model is linearly proportional to the number of structural configurations considered. The method, therefore, is ideally suited for optimization and uncertainty studies.
Reduced order model, Proper orthogonal decomposition, Computational fluid dynamics, Global structural modification, Flutter boundary, Time domain analysis
1270-9638
1-13
Chen, Gang
83a5c46f-13cc-4be3-ad5b-698a69e82b8e
Li, Dongfeng
dd8d9d17-ac74-4d9c-aa30-13817bb4c466
Zhou, Qiang
419faeb8-bdca-47ab-9aec-ce2bd7a15e22
Da Ronch, Andrea
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Li, Yueming
25bddbfd-fafe-4e4d-a575-af5dcff2693b
Chen, Gang
83a5c46f-13cc-4be3-ad5b-698a69e82b8e
Li, Dongfeng
dd8d9d17-ac74-4d9c-aa30-13817bb4c466
Zhou, Qiang
419faeb8-bdca-47ab-9aec-ce2bd7a15e22
Da Ronch, Andrea
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Li, Yueming
25bddbfd-fafe-4e4d-a575-af5dcff2693b

Chen, Gang, Li, Dongfeng, Zhou, Qiang, Da Ronch, Andrea and Li, Yueming (2018) Efficient aeroelastic reduced order model with global structural modifications. Aerospace Science and Technology, 76, 1-13. (doi:10.1016/j.ast.2018.01.023).

Record type: Article

Abstract

Time domain aeroelastic analysis has high computing costs when using computational fluid dynamics. These costs become prohibitive when the structural model undergoes large changes from the baseline design, as within an aircraft design process. To overcome this realistic challenge, we have developed, implemented, and demonstrated an efficient method that is robust in the presence of global modifications of the structure. The method consists of: a) a reduced order model of the linearized Navier-Stokes equations generated around an aeroelastic equilibrium that depends, in turn, on the structural model; b) an approximate structural dynamic reanalysis method valid for global modifications of the structure; and c) a mechanism to exchange information between fluid and structural solvers without need for calculating at each iteration of the structural design an eigenvalue problem of the modified structure. The resulting aeroelastic reduced order model is demonstrated for the AGARD 445.6 wing, and material properties are varied up to 100% from their original values. It is found that: a) predictions of the time domain aeroelastic response and of the flutter speed are accurate for all modifications of the structure; and b) the computational efficiency of the proposed aeroelastic reduced order model is linearly proportional to the number of structural configurations considered. The method, therefore, is ideally suited for optimization and uncertainty studies.

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Efficient Aeroelastic Reduced Order Model with Global Modifications of the Structure - Accepted Manuscript
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More information

Accepted/In Press date: 27 January 2018
e-pub ahead of print date: 7 February 2018
Published date: May 2018
Keywords: Reduced order model, Proper orthogonal decomposition, Computational fluid dynamics, Global structural modification, Flutter boundary, Time domain analysis

Identifiers

Local EPrints ID: 418134
URI: http://eprints.soton.ac.uk/id/eprint/418134
ISSN: 1270-9638
PURE UUID: 6e6a22d3-d873-4924-8d2e-35e90d5981ee

Catalogue record

Date deposited: 22 Feb 2018 17:30
Last modified: 26 Nov 2021 05:09

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Contributors

Author: Gang Chen
Author: Dongfeng Li
Author: Qiang Zhou
Author: Andrea Da Ronch
Author: Yueming Li

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