In the wind tunnel test, full-bridge aeroelastic model needs to simulate both shape and dynamic characteristics of real bridge, modal parameters are key parameters. Therefore, it is essential identify accurately. To get accurate long-span bridge in applications Hilbert-Huang transform for parameter identification were analyzed this paper. Then a band-pass filter designed original signal so that...

This paper presents investigation effects of a sharp edged gust on aeroelastic behavior and time-domain response of a typical section model using Jones approximate aerodynamics for pure plunging motion. Flutter analysis has been done by using p and p-k methods developed for presented finite-state aerodynamic model for a typical section model (airfoil). Introduction of gust analysis as a linear ...

Recent significant improvements to the development of CFD-based unsteady aerodynamic reduced-order models (ROMs) are implemented into the FUN3D unstructured flow solver. These improvements include the simultaneous excitation of the structural modes of the CFD-based unsteady aerodynamic system via a single CFD solution, minimization of the error between the full CFD and the ROM unsteady aerodyna...

The article investigates the numeric simulation of two-way aeroelastic processes applied to the experimental phase of a compressor; physical, mathematical, rigid and grid models of the system “gas – rotor – stator” have been worked out; 2 FSI (two-way Fluid-Structure Interaction) calculations have been performed on the evaluation of the interaction between a gas-dynamic flow and a deformable ro...

Abstract. This article describes the methodology adopted to implement an ILAF control system on a three surface aeroelastic demonstrator with the aim of shaping fuselage modal dynamics. General concepts used, hypotheses formulated and numerical results are provided to show that a numerical simulation involving reduced order models for aeroelastic models is suitable, even at a very early design ...

Aeroelasticity is a critical consideration in the design of gas turbine engines, both for stability and forced response. Current aeroelastic models cannot provide highdelity aerodynamics in a form suitable for design or control applications. In this thesis low-order, highdelity aerodynamic models are developed using systematic model order reduction from computational uid dynamic (CFD) methods. ...

The aim of this paper is to present a flutter analysis 3D Box-Wing Aircraft (BWA) configuration. box wing structure considered as consisting two wings (front and rear wings) connected with winglet. Plunge pitch motions are for each the winglet modeled by longitudinal spring. In order exert effect wing-joint interactions (bending torsion coupling), ends spring located on gravity centers tip sect...

This paper considers the aeroelastic optimization of a subsonic transport wingbox under a variety of static and dynamic aeroelastic constraints. Three types of design variables are utilized: structural variables (skin thickness, stiffener details), the quasi-steady deflection scheduling of a series of control surfaces distributed along the trailing edge for maneuver load alleviation and trim at...

In addition to its intrinsic practical importance, nonlinear time delayed feedback control applied to lifting surfaces can result in interesting aeroelastic behaviors. In this paper, nonlinear aeroelastic response to external time-dependent loads and stability boundary for actively controlled lifting surfaces, in an incompressible flow field, are considered. The structural model and the unstead...

This paper presents an adaptive control approach for flutter suppression of a performance adaptive aeroelastic wing equipped with a variable camber continuous trailing edge flap design. The adaptive control approach is based on the optimal control modification method augmented to a linear quadratic gaussian optimal control design. A model reduction based on a singular perturbation approach is p...