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- W2079190276 abstract "Most aquatic animals propel themselves by flapping flexible appendages. To gain insight into the effect of flexibility on the swimming performance, we have studied experimentally an idealized system. It consists of a flexible plate whose leading edge is forced into a harmonic heave motion, and which is immersed in a uniform flow. As the forcing frequency is gradually increased, resonance peaks are evidenced on the plate's response. In addition to the forcing frequency, the Reynolds number, the plate rigidity and the forcing amplitude have also been varied. In the range of parameters studied, the main effect on the resonance is due to the forcing amplitude, which reveals that non-linearities are essential in this problem. La plupart des animaux aquatiques se propulsent grâce au battement d'appendices flexibles. Afin d'avoir une meilleure compréhension de l'effet de la flexibilité sur la performance de la nage, nous avons étudié expérimentalement un système idéalisé. Il consiste en une plaque flexible, immergée dans un écoulement uniforme, dont le bord d'attaque est forcé en un mouvement harmonique transverse à l'écoulement. En augmentant graduellement la fréquence de forçage, des pics de résonance ont été mis en évidence. Outre la fréquence de forçage, on a également fait varier le nombre de Reynolds, la rigidité de la plaque et l'amplitude du forçage. Dans le domaine de paramètres étudié, le principal effet sur la résonance est dû à l'amplitude du forçage, ce qui révèle que les non-linéarités sont essentielles dans ce problème." @default.
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- W2079190276 date "2014-09-01" @default.
- W2079190276 modified "2023-10-18" @default.
- W2079190276 title "Experimental study of the response of a flexible plate to a harmonic forcing in a flow" @default.
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- W2079190276 doi "https://doi.org/10.1016/j.crme.2014.06.004" @default.
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