Low-frequency band gaps in one-dimensional thin phononic crystal plate with periodic stubbed surface |
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Authors: | Yuanwei Yao Zhilin HouFugen Wu Xin Zhang |
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Institution: | a Department of Physics, Guangdong University of Technology, Guangzhou 510006, China b Department of Physics, South China University of Technology, Guangzhou 510640, China c Experiment and Educational Center, Guangdong University of Technology, Guangzhou 510006, China |
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Abstract: | Using supercell plane wave expansion method, the Lamb wave band structure of one-dimensional thin plate with periodic stubs is investigated. The numerical results show that flat bands will appear and band gap can exist in a low-frequency domain. The position of the flat bands and width of the low-frequency Lamb wave band gap can be tuned by the stub height, plate thickness and filling fraction. The band gap is obtained by opening the folding points of the same plate modes not the crossing point of different plate mode when the stub height is small. |
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Keywords: | Lamb wave Band gap Low frequency |
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