Proceedings Article10.2514/6.2009-895
Gust Response Analysis Using CFD-Based Reduced Order Models
Weiwei Zhang,Qing Yang,Aiming Shi +2 more
- 05 Jan 2009
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TL;DR: In this paper, based on CFD technique and system identification method, a CFD-based reduced order model (ROM) is constructed in state space, which is compact and computationally efficient and validates the correctness and precision of the CFd-based ROM method.
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Abstract: Gust response analysis plays a very important role in large aircraft design. Most of existing aerodynamic models for gust response analysis are linearized models that can’t be used for nonlinear aeroelastic analysis, such as transonic problems. In this paper, based on CFD technique and system identification method, a CFD-based reduced order model (ROM) is constructed in state space. It is compact and computationally efficient. Gust response analysis is completed by coupling structural equations with CFD-based ROM. A squareedged gust response for a typical wing is shown. The results of the responses of generalized displacements and root bending moment (RBM) are compared well with that of direct CFD method and the reference paper. It validates the correctness and precision of the CFD-based ROM method.
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Citations
Gust loads on aircraft
TL;DR: This paper presents a systematic and comprehensive overview of important concepts and applications of gust loads on aircraft, and recommends to learn from previous experiences to avoid aviation accidents due to flight through atmospheric gusts and turbulence.
High Efficient Numerical Method for Limit Cycle Flutter Analysis Based on Nonlinear Aerodynamic Reduced Order Model
Weiwei Zhang,Bobin Wang,Zhengyin Ye +2 more
- 01 Jan 2010
TL;DR: In this paper, a nonlinear unsteady reduced order aerodynamic model is constructed by using Radial Basis Function (RBF) neural network model, which is used to analyze LCOs behaviors for two linear struc tural models with large shock motion in transonic flow.
17
High Efficient Numerical Method for Limit Cycle Flutter Analysis Based on Nonlinear Aerodynamic Reduced Order Model Reduced Order Model
Weiwei Zhang,Bobin Wang,Zhengyin Ye +2 more
- 12 Apr 2010
TL;DR: Signals of self-excited vibration of the aeroelastic system are designed as the input signals in this paper and show that both the structural responses and the limit cycle oscillation (LCO) characteristics simulated by ROM are agree well with those obtained by direct CFD method.
12
Computational-Fluid-Dynamics-Based Aeroservoelastic Analysis for Gust Load Alleviation
TL;DR: Gust load alleviation using computational fluid dynamics as source of the aerodynamic predictions is carried out in the time domain using an aeroservoelastic reduced-order model.
References
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TL;DR: In this paper, the authors review the development of new reduced-order modeling techniques and discuss their applicability to various problems in computational physics, including aerodynamic and aeroelastic behaviors of two-dimensional and three-dimensional geometries.
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Modeling of Fluid-Structure Interaction
Earl H. Dowell,Kenneth C. Hall +1 more
TL;DR: In this article, the authors present a review of the physical models for a fluid undergoing time-dependent motes and their applications in many fields of engineering, such as aeronautic and structural engineering.
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Dynamic Response of Highly Flexible Flying Wings
Weihua Su,Carlos E. S. Cesnik +1 more
TL;DR: In this article, a low-order, nonlinear, strain-based finite element framework is used to assess the fundamental impact of structural nonlinear effects in a computationally effective formulation target for preliminary vehicle design and control synthesis.
Accelerating computational fluid dynamics based aeroelastic predictions using system identification
TL;DR: Results show that system identie cation can accurately model the unsteady aerodynamic forces for complex aerospace structures of practical interest and results in a substantial savings in computational time when predicting aeroelastic instabilities.
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Experimental and Theoretical Study of Gust Response for High-Aspect-Ratio Wing
Deman Tang,Earl H. Dowell +1 more
TL;DR: In this paper, a nonlinear response analysis of a high-aspect-ratio wing aeroelastic model excited by gust loads is presented along with a companion wind-tunnel test program.
116