Results 11 to 20 of about 37,855 (164)
Comment améliorer l’enseignement et les apprentissages ?
Revue Internationale d’Éducation de Sèvres, 2006 From a survey conducted in the United-Kingdom, the author shows how the Student Voice movement has developed in schools and has allowed to understand students and the way they learn in a more subtle and refined way.
Julia Flutter
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Applied Sciences, 2020 Recently, the nonlinear flutter behavior of long-span suspension bridges has attracted attention. Unlike the classical theory of bridge flutter, the stable limit cycle oscillations (LCO) have occurred for some bluff aerodynamic configurations when the ...
Wenjie Li, Shujin Laima
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Nonlinear Flutter Analysis of Rudder System Containing Freeplay [PDF]
Hangkong bingqiThe nonlinear flutter of vehicle rudder system significantly impacts its stability and safety. This paper conducts modeling and computation of linear and nonlinear flutter in missile rudder systems containing freeplay， analyzes the mechanisms of ...
Zhang Kaimin, Deng Xueya, Chen Liye
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Postgraduate Medical Journal, 1977 Summary A case is reported of diaphragmatic flutter with an unusually long duration of symptoms. The patient described demonstrates many of the classical features of this disorder.
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Current Biology, 2003 The fluttering flight of butterflies is characteristic of these insects but belies the fact that most species are competent or strong fliers with several members carrying out spectacular migrations. However, new work by a team led by Angel Viloria based at the Natural History Museum in London, report in the Proceedings of the Royal Society published ...
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Flutter analysis of the IAR 99 SOIM aircraft [PDF]
INCAS Bulletin, 2013 Flutter analysis is considered for the minimum altitude at which the minimum designed Mach number is achieved, for the maximum altitude at which the maximum designed dynamic pressure is obtained and for the minimum altitude at which transonic effects ...
Dorin LOZICI-BRINZEI +2 more
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Buildings, 2022 In order to study the relationship between an aerostatic three-component coefficient (ATCC) and bridge flutter and to quickly evaluate the flutter performance of bridges, we proposed a method based on the empirical formula of the ATCC.
Hui Gao +4 more
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Stall Flutter Control of a Smart Blade Section Undergoing Asymmetric Limit Oscillations
Shock and Vibration, 2016 Stall flutter is an aeroelastic phenomenon resulting in unwanted oscillatory loads on the blade, such as wind turbine blade, helicopter rotor blade, and other flexible wing blades.
Nailu Li +4 more
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The Effect of Laminated Layers on the Flutter Speed of Composite Wing
Journal of Engineering, 2023 The paper presents an investigation to the flutter speed of composite wing for different ply orientation. Structurally the composite wing was idealized as a composite beam load carrying structure. Theodorsen’s expression was used to get the 2- dimension
Ahmed Abd Al-Hussain Ali +1 more
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Flutter Regularity of Flying Wing Configuration with All-Moving Wing Tip
气体物理, 2023 The performance requirements of modern fighters meet multiple targets such as high speed, high mobility, stealth, lightweight and so on. The aircraft with a tailless flying wing configuration has the advantages of high aerodynamic efficiency, good ...
Wei-ji WANG +4 more
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