D. Le-modèle-d-'efimtsov-pour-la, 40 3.6.2 La puissance injectée moyennée en fréquence, p.42

. La-comparaison-entre-la-théorie, expérience pour la plaque (C), présenté par la figure 4.29 donne les moins bons résultats. En effet, lesécartslesécarts peuventêtrepeuventêtre de l

. Db, octave pris en compte. Pourtant, ` a part pour U ? = 20ms ?1 , cesécarts cesécarts sontrégulì erement répartis au-dessus et en-dessous de la courbe théorique. De plus, principalement pour U ? = 35ms ?1 , le spectre mesuré ne suit pas l'allure caractéristique de la puissance injectée (on peut localiser plusieurs pentes différentes) Ces remarques m` enentàenentà penser que lesécartslesécarts

L. Résultats-obtenus-pour-la-plaque-rectangulaire-en and P. , D) sont présentés dans la figure 4.30. Ils témoignent d'une bonne concordance entre la théorie et la mesure et viennent confirmer que la puissance injectée est, en moyenne en fréquence, indépendante de l'amortissement . En effet, les modèles P IM F donnent de bons résultats pour les plaques (B) et (D) qui ont des amortissements très différents (0

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