Transonic Aeroelastic Stability Predictions Under the Influence of Structural Variability

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

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Flutter prediction as currently practiced is almost always deterministic in nature, based on a single structural model that is assumed to represent a fleet of aircraft. However, it is also recognized that there can be significant structural variability, even for different flights of the same aircraft. The safety factor used for flutter clearance is in part meant to account for this variability. Simulation tools can, however, represent the consequences of structural variability in the flutter predictions, providing extra information that could be useful in planning physical tests and assessing risk. The main problem arising for this type of calculation when using high-fidelity tools based on computational fluid dynamics is the computational cost. The current paper uses an eigenvalue-based stability method together with Euler-level aerodynamics and different methods for propagating structural variability to stability predictions. The propagation methods are Monte Carlo, perturbation, and interval analysis. The feasibility of this type of analysis is demonstrated. Results are presented for the Goland wing and a generic fighter configuration.
Original languageEnglish
Pages (from-to)1229-1239
Number of pages11
JournalJournal of Aircraft
Issue number4
Publication statusPublished - Jul 2010

ASJC Scopus subject areas

  • Aerospace Engineering


Dive into the research topics of 'Transonic Aeroelastic Stability Predictions Under the Influence of Structural Variability'. Together they form a unique fingerprint.

Cite this