نتایج جستجو برای: nonlinear aeroelasticity

تعداد نتایج: 219152  

Journal: :Engineering Structures 2021

Literature is rich about studies which concern the insurgence of instability structural systems under action steady flows, have led to well-consolidated methods assess safety with regard aeroelastic phenomena induced by synoptic winds. On other hand, there are no clear references regarding aeroelasticity effect thunderstorm outflows, events characterised irregular variations wind speed and dire...

Journal: :Progress in Aerospace Sciences 2021

Abstract This paper presents an extensive review of the developments in aeroelasticity morphing aircraft that occurred last decade (from 2009 to 2020). It focuses mainly on fixed-wing and highlights some representative examples from rotary-wing aircraft. Morphing wings are usually associated with significant changes aerodynamic loads, structural/elastic properties, inertial properties hence aer...

2014
Bret K. Stanford Peter D. Dunning

Several topology optimization problems are conducted within the ribs and spars of a wing box. It is desired to locate the best position of lightening holes, truss/cross-bracing, etc. A variety of aeroelastic metrics are isolated for each of these problems: elastic wing compliance under trim loads and taxi loads, stress distribution, and crushing loads. Aileron effectiveness under a constant rol...

2009
D. D. Liu P. C. Chen Z. Zhang Z. Wang S. Yang D. H. Lee

The morphing of an air vehicle is to change its shape and size substantially during flight. Thus, the morphing vehicle is to achieve a broader range of operational modes, all of which will maximize the vehicle performance throughout its mission profile. The dream of human flight has been to mimic birds or insect flights in similar manner since the days of Leonardo da Vinci. Our current aeronaut...

2010
Serge Piperno

In this paper, we survey numerical methods used in aeroelasticity simulations. These methods are based on two-dimensional Euler equations. However, they are quite general. First, we consider uid dynamics numerical methods, which are also used to solve moving boundaries problems. Fixed computational domain methods (possibly with multiple moving frames of reference) are introduced. Arbitrary Lagr...

2003
A. V. Balakrishnan

This paper initiates a mathematical theory of aeroelasticity centered on the canonical problem of the flutter boundary an instability endemic to aircraft that limits attainable speed in the subsonic regime. We develop a continuum mathematical model that exhibits the known flutter phenomena and yet is amenable to analysis non-numeric theory. Thus we model the wing as a cantilever beam and limit ...

2007
Beerinder Singh Inderjit Chopra Balakumar Balachandran

Title of dissertation: DYNAMICS AND AEROELASTICITY OF HOVER CAPABLE FLAPPING WINGS: EXPERIMENTS AND ANALYSIS Beerinder Singh, Doctor of Philosophy, 2006 Dissertation directed by: Professor Inderjit Chopra Department of Aerospace Engineering This dissertation addresses the aerodynamics of insect-based, bio-inspired, flapping wings in hover. An experimental apparatus, with a bio-inspired flapping...

Journal: :Opìr Materìalìv ì Teorìâ Sporud 2023

The transonic flutter of the aerodynamic control surfaces supersonic and hypersonic aircraft refers to those phenomena dynamic aeroelasticity, assessment whichin a flight experiment is dangerous. Since there still no universally accepted mathematical model occurrence this phenomenon, tests dynamic-like models in wind tunnels can be classified as basic safe methods for evaluating characteristics...

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