scholarly journals Nonlinear Aeroelastic Response of Highly Flexible Flying Wing Due to Different Gust Loads

2018 ◽  
Author(s):  
Ehsan Izadpanahi ◽  
Pezhman Mardanpour
Keyword(s):  
Aeroelastic Response ◽  
Gust Loads

scholarly journals Response of a Light Aircraft Under Gust Loads

10.14311/556 ◽  
2004 ◽  
Vol 44 (2) ◽  
Author(s):  
P. Chudý
Keyword(s):  
Software Package ◽  
Aerospace Engineering ◽  
Structural Flexibility ◽  
Aeroelastic Response ◽  
Stochastic Nature ◽  
The Past ◽  
University Of Technology ◽  
Gust Loads ◽  
Gust Response

This project presents work performed by the Institute of Aerospace Engineering, Brno University of Technology. The primary purpose of this work was to estimate the aeroelastic response of a light aircraft under gust loads. In the past, the gust response has been investigated using the Pratt - Walker formula. This formula is derived from the response of a rigid airplane to a discrete gust. However, the Pratt-Walker formula does not capture either the stochastic nature of continuous turbulence or the effects of structural flexibility. The analysis described here was performed using the advanced FEM software package MSC Nastran.

AEROTHERMOELASTIC RESPONSE OF HYPERSONIC 2-D LIFTING SURFACE

2012 ◽  
Vol 11 (02) ◽  
pp. 1250017
Author(s):  
YAOBIN NIU ◽  
ZHONGWEI WANG ◽  
HUIXIN YANG ◽  
XIXIANG YANG
Keyword(s):  
High Speed ◽  
Displacement Amplitude ◽  
Torsional Stiffness ◽  
Aerodynamic Heating ◽  
Adiabatic Wall ◽  
Aeroelastic System ◽  
Aeroelastic Response ◽  
Piston Theory ◽  
Lifting Surface ◽  
Gust Loads

The expressions of unsteady gust loads are derived based on the piston theory in this paper. The aerothermoelastic response of hypersonic two degree-of-freedom airfoil is analyzed. The calculation of the unsteady aerodynamic lift and moment are given based on third-order piston theory. Also considered is the loss of torsional stiffness that may be incurred by lifting surface subject to axial stresses induced by aerodynamic heating. The aerodynamic heating effects are estimated based on the adiabatic wall temperature due to high speed airstreams. The effect of horizontal gust loads on aeroelastic response system is compared with vertical gust loads. Then the relationship between the pitching displacement amplitude and the gust velocity is analyzed. Numerical results show that horizontal gust has little effect on the stabilization system, while the vertical gust has a significant effect on the aeroelastic system. The acceleration of airfoil which is generated due to the vertical gust can cause the system to become vibrating for a long time. The results also show that pitching displacement amplitude of the aeroelastic response is in the direct proportion to the gust velocity, the proportion is about 3.8 × 10-4.

Nonlinear response of airfoil section with control surface freeplay to gust loads

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1543-1557 ◽  
Author(s):  
Deman Tang ◽  
Denis Kholodar ◽  
Earl H. Dowell
Keyword(s):  
Nonlinear Response ◽  
Control Surface ◽  
Airfoil Section ◽  
Gust Loads

Derivation of Forcing Functions for Monte Carlo Atmospheric Gust Loads Analysis

1999 ◽  
Author(s):  
B. H. Sako ◽  
M. C. Kim ◽  
A. M. Kabe ◽  
W. K. Yeung
Keyword(s):  
Monte Carlo ◽  
Forcing Functions ◽  
Loads Analysis ◽  
Gust Loads

Statistical Analysis of Atmospheric Flight Gust Loads Analysis Data

1999 ◽  
Author(s):  
J. B. Clark ◽  
M. C. Kim ◽  
A. M. Kabe
Keyword(s):  
Statistical Analysis ◽  
Analysis Data ◽  
Loads Analysis ◽  
Gust Loads

Analysis of nonlinear aeroelastic response of curved panels under shock impingements

2021 ◽  
Vol 107 ◽  
pp. 103404
Author(s):  
Xiaomin An ◽  
Bin Deng ◽  
Jiayue Feng ◽  
Youwen Qu
Keyword(s):  
Aeroelastic Response ◽  
Curved Panels

Effect of Segmented Electrodes on Piezo-Elastic and Piezo-Aero-Elastic Responses of Generator Plates

2009 ◽  
Author(s):  
Carlos De Marqui ◽  
Alper Erturk ◽  
Daniel J. Inman
Keyword(s):  
Electrical Power ◽  
Elastic Behavior ◽  
Elastic Model ◽  
Fe Model ◽  
Aeroelastic Response ◽  
Aerodynamic Model ◽  
Frequency Excitation ◽  
Elastic Responses ◽  
Electrical Power Output ◽  
Tip Mass

In this paper, the use of segmented electrodes is investigated to avoid cancellation of the electrical outputs of the torsional modes in energy harvesting from piezo-elastic and piezo-aero-elastic systems. The piezo-elastic behavior of a cantilevered plate with an asymmetric tip mass under base excitation is investigated using an electromechanically coupled finite element (FE) model. Electromechanical frequency response functions (FRFs) are obtained using the coupled FE model both for the continuous and segmented electrodes configurations. When segmented electrodes are considered torsional modes also become significant in the resulting electrical FRFs, improving broadband (or varying-frequency excitation) performance of the generator plate. The FE model is also combined with an unsteady aerodynamic model to obtain the piezo-aero-elastic model. The use of segmented electrodes to improve the electrical power generation from aeroelastic vibrations of plate-like wings is investigated. Although the main goal here is to obtain the maximum electrical power output for each airflow speed (both for the continuous and segmented electrode cases), piezoelectric shunt damping effect on the aeroelastic response of the generator wing is also investigated.

Sign in / Sign up

Export Citation Format

Share Document