期刊
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
卷 21, 期 3, 页码 1119-1132出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1099636217707933
关键词
Sandwich plate; phononic crystal; band gap; frequency response; attenuation; vibration isolation
类别
资金
- National Natural Science Foundation of China [51178037]
The vibration isolation performance of a PC sandwich plate with periodic hollow tube core is investigated experimentally and numerically. The experiment results reveal that there exist vibration attenuation zones in acceleration frequency responses which can be improved by increasing the number of periods or tuning some structure parameters. The presence of soft fillers shifts the attenuation zone to lower frequencies and enhances the capability of vibration isolation to some extent. Dispersion relations and acceleration frequency responses are calculated by finite element method using COMSOL MULTIPHYSICS. The attenuation zones obtained by experiments fit well with that by simulations, and both are consistent with the band gap in dispersion relations. The numerical and experimental studies in the present paper show that this PC sandwich plate exhibits a good performance on vibration isolation in low frequency ranges, which will provide some useful references for relevant research and potential applications in vibration propagation manipulations.
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