Band gaps and vibration of strongly heterogeneous Reissner–Mindlin elastic plates
Band gaps and vibration of strongly heterogeneous Reissner–Mindlin elastic plates
复制标题
强异质 Reissner-Mindlin 弹性板的带隙和振动
DOI:
10.1016/j.crma.2011.05.013
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发表时间:
2011
影响因子:
0.8
通讯作者:
B. Miara
中科院分区:
文献类型:
--
作者:
E. Rohan;B. Miara
We consider an elastic plate governed by the Reissner–Mindlin’s model, ie, whose equilibrium equations introduce a coupling between the vertical displacement and the rotation of the normal. This structure is made of a composite with a periodic arrangement of strongly heterogeneous materials and some characteristics of the heterogeneities are comparable to the size of the microstructures. We show that, when the size of the microstructures tends to zero, the limit homogeneous structure presents, for some wavelengths, a negative “mass density” tensor. This means that there exist intervals of frequencies–the band gaps–for which wave propagation is suppressed, or restricted to certain polarizations.© 2011 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved. r é sum éOn étudie l’influence de fortes hétérogénéités sur la propagation des ondes dans une plaque de Reissner–Mindlin. On montre que lorsque certaines caractéristiques élastiques sont comparables à la taille des microstructures du composite il apparaît des bandes interdites, ie des intervalles de fréquences–les bandes interdites–pour lesquels la propagation des ondes ne peut pas se faire ou bien est restreinte à certaines polarisations.© 2011 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.