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Title:
Uncertain reduced-order modeling for unsteady aerodynamics with interval parameters and its application on robust flutter boundary prediction
Author: Chen, Xianjia; Qiu, Zhiping; Wang, Xiaojun; Li, Yunlong; Wang, Ruixing
Source: AEROSPACE SCIENCE AND TECHNOLOGY
Issued Date: 2017-12-01
Volume: 71, Pages:214-230
Abstract:

Computational fluid dynamics based unsteady aerodynamic reduced-order models can significantly improve the efficiency of transonic aeroelastic analysis. In this paper, the concept of the conventional model reduction method based on the system identification theory is extended to aerodynamic subsystems with the consideration of computational fluid dynamics-induced interval uncertainties in simulation to get the aerodynamic reduced-order model as uncertain as the original aerodynamic subsystem. The interval estimation of identified coefficients involved in the uncertain reduced-order model is obtained by utilizing the first-order interval perturbation method. The stability problem of the interval aeroelastic state-space model formulated based on the constructed uncertain aerodynamic reduced-order model is equivalently transformed into a standard interval eigenvalue problem associated with a real non-symmetric interval matrix in which the interval bounds of eigenvalues are evaluated by virtue of the first-order interval matrix perturbation algorithm. A new stability criterion for the interval aeroelastic state matrix is defined to predict the robust flutter boundary of the concerned uncertain aeroelastic system. Two numerical examples with respect to the uncertain aerodynamic ROM constructions and robust flutter boundary predictions of the two-dimensional Isogai wing and the three-dimensional AGARD 445.6 wing in transonic regime are implemented to assess the validity and accuracy of the presented approach. The obtained results are also compared with Monte Carlo simulation solutions as well as numerical and experimental results in the literatures indicating that the proposed method can provide a more robust and conservative prediction on the flutter boundary of an aeroelastic system compared with conventional deterministic aeroelastic analysis approaches. (C) 2017 Elsevier Masson SAS. All rights reserved.

Keyword: Uncertain reduced-order modeling ; Robust flutter analysis ; Interval perturbation method ; Uncertain aeroelastic system
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Qiu, ZP, Beihang Univ, Inst Solid Mech, Beijing 100191, Peoples R China.
DOI: 10.1016/j.ast.2017.09.018
DOC Type: Article
WOS Subject: Engineering, Aerospace
WOS Subject Extended: Engineering
WOS Keyword Plus: TRANSONIC-DIP MECHANISM ; WING FLUTTER ; AEROELASTIC SYSTEMS ; QUANTIFICATION ; IDENTIFICATION ; DESIGN
WOS ID: WOS:000418313700022
ISSN: 1270-9638
Funder: National Nature Science Foundation of the P.R. China(11432002 ; Major Research Project(MJ-F-2012-04) ; National Key Research and Development Program(2016YFB0200704) ; Defense Industrial Technology Development Program(JCKY2013601B001 ; 111 Project(B07009) ; 11572024) ; JCKY2016601B001)
Classification: 一类
Ranking: 5
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/72233
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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Recommended Citation:
Chen, Xianjia,Qiu, Zhiping,Wang, Xiaojun,et al. Uncertain reduced-order modeling for unsteady aerodynamics with interval parameters and its application on robust flutter boundary prediction[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2017-12-01,71:214-230.
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