Abstract
In the present work we determine the influence of structural damping, of an aluminum alloy on the dynamic behavior of a plate with various boundary conditions. Structural damping (loss factor energy) is a very significant parameter by its influence on the dynamic behavior of the mechanical structures. The material of the studied plate is the aluminum alloy 2024 T3 and 7050 T7351. The behavior vibratory of the plate is studied by the finite element method and a comparative study is presented for theses materials. We present also the influence of the loss factor energy on the variation of the inertance relating to each node and each degree of freedom. In parallel, we study the influence of the geometrical parameters of the structure in the frequency domain. In addition, we identify the excited mode of vibration where a comparative example for steel is presented in order to show the excited mode of vibration. The effect of the internal damping is significant in resonance peak, where the reduction of the vibratory amplitude (inertance) is significant. The increase of the geometrical parameters (thickness, ratio length/width), decreases the vibratory amplitude, and on the other hand shift the peaks of resonance towards the high frequencies. The boundary conditions have a great influence on the rotational inertances in a resonance peak.
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Benachour, M., Hadjoui, A., Hadjoui, F., Benguediab, M., Benachour, N. (2006). Comparative Study of Aluminum Alloy Plate 2024/7050 Under the Effect of Internal Damping. In: Motasoares, C.A., et al. III European Conference on Computational Mechanics. Springer, Dordrecht. https://doi.org/10.1007/1-4020-5370-3_106
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DOI: https://doi.org/10.1007/1-4020-5370-3_106
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4994-1
Online ISBN: 978-1-4020-5370-2
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