Sensitivity analysis of the aeroelastic stability of a composite wing-box with uncertain material properties

C. Scarth, P. Sartor, J. E. Cooper, G. H C Silva

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)

Abstract

Global sensitivity analysis is undertaken for the aeroelastic stability of a composite wing in order to assess sensitivity to uncertain material properties. The wing is idealised as a thin-walled beam. A Gaussian process is fitted to aeroelastic instabily speed using Bayesian inference, and used as an emulator which may be run with considerably less computational effort. Multiple emulators are required because the critical instability speed is non-smooth. Uncertainties are introduced to the ply orientations and moduli of the upper and lower flanges of the beam, and 'lamination parameters' are used to prevent the input dimension from growing with the number of plies. Sensitivity indices are determined using Monte Carlo integration. Results show that uncertainty in ply orientation typically contributes significantly to the output variance; however, uncertainty cannot be neglected in the other inputs since the instability speed is highly sensitive to different moduli for different layups.

Original languageEnglish
Title of host publicationProceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics
PublisherK U Leuven
Pages4571-4585
Number of pages15
ISBN (Print)9789073802919
Publication statusPublished - 1 Jan 2014
Event26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014 - Leuven, Belgium
Duration: 15 Sep 201417 Sep 2014

Conference

Conference26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014
CountryBelgium
CityLeuven
Period15/09/1417/09/14

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  • Cite this

    Scarth, C., Sartor, P., Cooper, J. E., & Silva, G. H. C. (2014). Sensitivity analysis of the aeroelastic stability of a composite wing-box with uncertain material properties. In Proceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics (pp. 4571-4585). K U Leuven.