Multiple wide complete bandgaps of two-dimensional phononic crystal slabs with cross-like holes
作者： Yan-Feng Wang , Yue-Sheng Wang
DOI: 10.1016/J.JSV.2012.11.031
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摘要: Abstract This paper investigates the bandgap properties of two-dimensional phononic crystal slabs with cross-like holes by using finite element method. The effects slab thickness and geometry parameters on bandgaps are discussed. No appears in system square if symmetry is same as that lattice. However replaced holes, multiple wide at lower frequencies generated. significantly dependent (including size, shape rotation) holes. vibration modes edges computed analyzed to clarify mechanism generation. It found generation due flexural localized lumps or connectors. appearances higher cut-off which decrease increasing result upper edge, finally lead vanishing bandgap. study this could be indispensable practical applications such tuning.
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