Smolyak-Grid-Based Flutter Analysis with the Stochastic Aerodynamic Uncertainty
Joint Authors
Source
Discrete Dynamics in Nature and Society
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-23
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
How to estimate the stochastic aerodynamic parametric uncertainty on aeroelastic stability is studied in this current work.
The aerodynamic uncertainty is more complicated than the structural one, and it takes more significant effect on the flutter boundary.
First, the nominal unsteady aerodynamic influence coefficients were calculated with the doublet lattice method.
Based on this nominal model, the stochastic uncertainty model for unsteady aerodynamic pressure coefficients was constructed with physical meaning.
Afterwards, the methodology for flutter uncertainty quantification due to aerodynamic perturbation was developed, based on the nonintrusive polynomial chaos expansion theory.
In order to enhance the computational efficiency, the integration algorithm, namely, Smolyak sparse grids, was employed to calculate the coefficients of the stochastic polynomial basis.
Finally, the flutter uncertainty analysis methodology was applied to an aircraft's wing model.
The influence of uncertainty with uniform distribution for aerodynamic pressure coefficients on flutter boundary was quantified.
The numerical results indicate that, the influence of unsteady aerodynamic pressure due to the motion of coupling modes takes significant effect on flutter boundary.
It is validated that the flutter uncertainty analysis based on Smolyak sparse grids integration is efficient and accurate for quantifying input uncertainty with high dimensions.
American Psychological Association (APA)
Dai, Yuting& Yang, Chao. 2014. Smolyak-Grid-Based Flutter Analysis with the Stochastic Aerodynamic Uncertainty. Discrete Dynamics in Nature and Society،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-451895
Modern Language Association (MLA)
Dai, Yuting& Yang, Chao. Smolyak-Grid-Based Flutter Analysis with the Stochastic Aerodynamic Uncertainty. Discrete Dynamics in Nature and Society No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-451895
American Medical Association (AMA)
Dai, Yuting& Yang, Chao. Smolyak-Grid-Based Flutter Analysis with the Stochastic Aerodynamic Uncertainty. Discrete Dynamics in Nature and Society. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-451895
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-451895