Bifurcation Analysis with Aerodynamic-Structure Uncertainties by the Nonintrusive PCE Method
Joint Authors
Yang, Chao
Wang, Linpeng
Dai, Yuting
Source
International Journal of Aerospace Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-02-16
Country of Publication
Egypt
No. of Pages
17
Abstract EN
An aeroelastic model for airfoil with a third-order stiffness in both pitch and plunge degree of freedom (DOF) and the modified Leishman–Beddoes (LB) model were built and validated.
The nonintrusive polynomial chaos expansion (PCE) based on tensor product is applied to quantify the uncertainty of aerodynamic and structure parameters on the aerodynamic force and aeroelastic behavior.
The uncertain limit cycle oscillation (LCO) and bifurcation are simulated in the time domain with the stochastic PCE method.
Bifurcation diagrams with uncertainties were quantified.
The Monte Carlo simulation (MCS) is also applied for comparison.
From the current work, it can be concluded that the nonintrusive polynomial chaos expansion can give an acceptable accuracy and have a much higher calculation efficiency than MCS.
For aerodynamic model, uncertainties of aerodynamic parameters affect the aerodynamic force significantly at the stage from separation to stall at upstroke and at the stage from stall to reattach at return.
For aeroelastic model, both uncertainties of aerodynamic parameters and structure parameters impact bifurcation position.
Structure uncertainty of parameters is more sensitive for bifurcation.
When the nonlinear stall flutter and bifurcation are concerned, more attention should be paid to the separation process of aerodynamics and parameters about pitch DOF in structure.
American Psychological Association (APA)
Wang, Linpeng& Dai, Yuting& Yang, Chao. 2017. Bifurcation Analysis with Aerodynamic-Structure Uncertainties by the Nonintrusive PCE Method. International Journal of Aerospace Engineering،Vol. 2017, no. 2017, pp.1-17.
https://search.emarefa.net/detail/BIM-1157941
Modern Language Association (MLA)
Wang, Linpeng…[et al.]. Bifurcation Analysis with Aerodynamic-Structure Uncertainties by the Nonintrusive PCE Method. International Journal of Aerospace Engineering No. 2017 (2017), pp.1-17.
https://search.emarefa.net/detail/BIM-1157941
American Medical Association (AMA)
Wang, Linpeng& Dai, Yuting& Yang, Chao. Bifurcation Analysis with Aerodynamic-Structure Uncertainties by the Nonintrusive PCE Method. International Journal of Aerospace Engineering. 2017. Vol. 2017, no. 2017, pp.1-17.
https://search.emarefa.net/detail/BIM-1157941
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157941