نتایج جستجو برای: aeroelasticity

تعداد نتایج: 216  

2009
Sarah Slaughter

Recent increases in limit spans of cable-stayed bridges have highlighted the need for new concepts in analysis and design. The increased flexibility requires more theoretical studies on non-linear behavior and on dynamic analysis. Design also is more oriented to a performance-based approach: motion control is more important than strength analysis. My main objective is to define what are the par...

2012
Justin T. Webster Irena Lasiecka

We consider an aeroelastic model known as a nonlinear flow-structure interaction, which describes the oscillations of a thin, flexible plate immersed in a potential flow. This model is used to study the phenomenon known as flutter, which involves the coupling of the plate’s vibrational modes with the aerodynamic load. Here, we treat this problem from a partial differential equations point of vi...

2003
Yin Zhou Ahsan Kareem

The ‘‘stick’’ type aeroelastic model, referred to here as ‘‘aeroelastic balance,’’ has served as an effective tool for investigating wind-induced response of tall buildings and towers in both fundamental research as well as design applications. However, some questions still remain unaddressed in the available literature regarding the efficacy of the aeroelastic balance as a design tool. These c...

2005
M. Sergio Campobasso Michael B. Giles

The linear flow analysis of turbomachinery aeroelasticity views the unsteady flow as the sum of a background nonlinear flow field and a linear harmonic perturbation. The background state is usually determined by solving the nonlinear steady flow equations. The flow solution representing the amplitude and phase of the unsteady perturbation is instead given by the solution of a large complex line...

2007
Nhan Nguyen

This paper presents an integrated flight dynamic modeling method for flexible aircraft that captures coupled physics effects due to inertial forces, aeroelasticity, and propulsive forces that are normally present in flight. The present approach formulates the coupled flight dynamics using a structural dynamic modeling method that describes the elasticity of a flexible, twisted, swept wing using...

Journal: :Aerospace Science and Technology 2021

Morphing aircraft structures usually introduce greater compliance into aerodynamic sections, and therefore will affect the aeroelasticity with potential risk of increased flutter. A low-fidelity model an active camber morphing wing its aeroelastic are developed in order to investigate critical speed by exploiting chord-wise dimension flexibility. Such a may be used for conceptual design, where ...

2000
M. S. Campobasso M. B. Giles

This report reviews the mathematical analysis of mistuned aeroelasticity in turbomachines, avoiding excessive mathematical complexity, and putting the emphasis on the physical interpretation of the mathematics. The aeroe-lastic behaviour can be analysed either by considering the motion of individual blades or by considering a sum of travelling wave modes. The modal viewpoint is shown to be most...

2005
Kazuhisa Chiba Shigeru Obayashi Kazuhiro Nakahashi Hiroyuki Morino

A large-scale, real-world application of Evolutionary MultiCriterion Optimization (EMO) is reported in this paper. The Multidisciplinary Design Optimization among aerodynamics, structures and aeroelasticity for the wing of a transonic regional jet aircraft has been performed using high-fidelity models. An Euler/Navier-Stokes (N-S) Computational Fluid Dynamics (CFD) solver is employed for the ae...

2016
Kun Ye Zhengyin Ye Zihang Chen Zhan Qu

A novel parameterized model for temperature distribution is proposed. A framework for uncertainty quantification and global sensitivity in hypersonic aerothermoelastic analysis is developed based on this model. The uncertainty quantification and global sensitivity analysis in hypersonic aerothermoelastic analysis for control surface due to hypersonic aerothermodynamics is investigated in this s...

1995
David E. Keyes

Parallel implicit solution methods are increasingly important in aerodynamics , since reliable low-residual solutions at elevated CFL number are prerequisite to such large-scale applications of aerodynamic analysis codes as aeroelasticity and optimization. In this chapter, a class of nonlinear implicit methods and a class of linear implicit methods are deened and illustrated. Their composition ...

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