On how structural model variability influence transonic aeroelasticity stability.

S. Marques, K.J. Badcock, H.H. Khodaparast, J.E. Mottershead

Research output: Contribution to conferencePaper

Abstract

This paper considers the ways in which structural model parameter variability can in?uence aeroelastic stability. Previous work on formulating the stability calculation (with the Euler equations providing the aerodynamic predictions) is exploited to use Monte Carlo, Interval and Perturbation calculations to allow this question to be investigated. Three routes are identi?ed. The ?rst involves variable normal mode frequencies only. The second involves normal mode frequencies and mode shapes. Finally, the third, in addition to normal mode frequencies and mode shapes, also includes their in?uence on the static equilibrium. Previous work has suggested only considering route 1, which allows signi?cant gains in computational e?ciency if reduced order models can be built for the aerodynamics. However, results in the current paper show that neglecting route 2 can give misleading results for the ?utter onset prediction.
Original languageEnglish
Pages1-16
Number of pages16
DOIs
Publication statusPublished - 2010
Event51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Orlando, United States
Duration: 12 Apr 201015 Apr 2010

Conference

Conference51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
CountryUnited States
CityOrlando
Period12/04/201015/04/2010

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