The transverse vibration control of a clamped, rectangular, isotropic plate by a vibratory°ap subjected to harmonic excitation has been investigated by Finite Element Analysis (FEA) and experimental technique. The vibratory°ap is a new plate-type dynamic vibration absorber, which can vibrate on the plate when attached as a cantilever plate. The study has been focused speci¯cally on the in°uence of aspect ratio of vibratory°ap on the dynamic response of the plate at constant mass ratio and constant tuning frequency ratio. The study has revealed that the dynamic response of the plate varies with respect to the aspect ratio for aforementioned conditions. An optimum aspect ratio has also been obtained by minimizing the mass ratio with maximum attenuation in the¯rst and second target frequencies. The results have shown that the optimized°ap can trim down the plate vibrations by up to 90-95% in the fundamental mode. Moreover, the dynamic response of the plate can be improved to a great extent due to the adoption of an optimal aspect ratio of the°ap. Finally, the experimental outcomes have shown fairly good agreement with the results obtained from the¯nite element analysis.
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 In structural applications, plates with cut-out or holes are commonly used. The structure will deteriorate dynamically due to presence of cut-out and experiences amplification in vibrations. This paper presents an experimental study on effect of position of vibratory flap on dynamic response of a clamped rectangular plate with cut-out subjected to harmonic excitation. Vibratory flap is an auxiliary plate attached on the main plate as a cantilever plate and acts as a dynamic vibration absorber, which is used to reduce the vibration of the plate at first and second frequencies. Investigation has been carried out for different combinations of flap location and orientation through experimental sine sweep test. From the test it is found that, there is an optimum position where vibration suppression is more effective with improved dynamic response of the plate with cut-out in the presence of flap. 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