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Transonic aeroelastic simulation for envelope searches and uncertainty analysis

Transonic aeroelastic simulation for envelope searches and uncertainty analysis
Transonic aeroelastic simulation for envelope searches and uncertainty analysis
In this paper the use of eigenvalue stability analysis of very large dimension aeroelastic numerical models arising from the exploitation of computational fluid dynamics is reviewed. A formulation based on a block reduction of the system Jacobian proves powerful to allow various numerical algorithms to be exploited, including frequency domain solvers, reconstruction of a term describing the fluid–structure interaction from the sparse data which incurs the main computational cost, and sampling to place the expensive samples where they are most needed. The stability formulation also allows non-deterministic analysis to be carried out very efficiently through the use of an approximate Newton solver. Finally, the system eigenvectors are exploited to produce nonlinear and parameterised reduced order models for computing limit cycle responses. The performance of the methods is illustrated with results from a number of academic and large dimension aircraft test cases.
0376-0421
392-423
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef
Timme, S.
d688c7f1-3a3d-44e0-ad8c-15f350c91ff8
Marques, S.
5ea29e28-64ed-487f-9274-eeb5f57d03be
Khodaparast, H.
df029c9f-672f-4b77-9d32-2234db911b8b
Prandina, M.
e703b20a-31bc-4e7d-b4ff-9e88fe1c572d
Mottershead, J.
c27dbb93-202e-46cc-abf0-da5b9029dee7
Swift, A.
9897ec7a-5a18-43f5-9da9-8e6141b5d60a
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Woodgate, M.
3e1ebd28-6784-4166-a3a2-5d699cfd2f51
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef
Timme, S.
d688c7f1-3a3d-44e0-ad8c-15f350c91ff8
Marques, S.
5ea29e28-64ed-487f-9274-eeb5f57d03be
Khodaparast, H.
df029c9f-672f-4b77-9d32-2234db911b8b
Prandina, M.
e703b20a-31bc-4e7d-b4ff-9e88fe1c572d
Mottershead, J.
c27dbb93-202e-46cc-abf0-da5b9029dee7
Swift, A.
9897ec7a-5a18-43f5-9da9-8e6141b5d60a
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Woodgate, M.
3e1ebd28-6784-4166-a3a2-5d699cfd2f51

Badcock, K. J., Timme, S., Marques, S., Khodaparast, H., Prandina, M., Mottershead, J., Swift, A., Da Ronch, A. and Woodgate, M. (2011) Transonic aeroelastic simulation for envelope searches and uncertainty analysis. Progress in Aerospace Sciences, 47 (5), 392-423. (doi:10.1016/j.paerosci.2011.05.002).

Record type: Article

Abstract

In this paper the use of eigenvalue stability analysis of very large dimension aeroelastic numerical models arising from the exploitation of computational fluid dynamics is reviewed. A formulation based on a block reduction of the system Jacobian proves powerful to allow various numerical algorithms to be exploited, including frequency domain solvers, reconstruction of a term describing the fluid–structure interaction from the sparse data which incurs the main computational cost, and sampling to place the expensive samples where they are most needed. The stability formulation also allows non-deterministic analysis to be carried out very efficiently through the use of an approximate Newton solver. Finally, the system eigenvectors are exploited to produce nonlinear and parameterised reduced order models for computing limit cycle responses. The performance of the methods is illustrated with results from a number of academic and large dimension aircraft test cases.

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More information

Published date: July 2011
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 351513
URI: https://eprints.soton.ac.uk/id/eprint/351513
ISSN: 0376-0421
PURE UUID: e0ae9e73-85f1-4e9a-b8c4-a2bcbde4480f

Catalogue record

Date deposited: 23 Apr 2013 12:11
Last modified: 16 Jul 2019 21:36

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