Low-frequency band gap mechanism of torsional vibration of lightweight elastic metamaterial shafts
Release time:2024-08-09
Hits:
- Affiliation of Author(s):
- 机电工程学院
- Journal:
- European Physical Journal Applied Physics
- Key Words:
- 中文关键字：声子晶体，轻质轴，弹性超材料，英文关键字：
- Abstract:
- In this paper, the low-frequency band gap mechanism of torsional vibration is investigated for a kind of light elastic metamaterial (EM) shafts architecture comprised of a radial double-period element periodically as locally resonant oscillators with low frequency property. The dispersion relations are calculated by a method combining the transfer matrix and a lumped-mass method. The theoretical results agree well with finite method simulations, independent of the density of the hard material ring. The effects of the material parameters on the band gaps are further explored numerically. Our results show that in contrast to the traditional EM shaft, the weight of our proposed EM shaft can be reduced by 27% in the same band gap range while the vibration attenuation is kept unchanged, which is very convenient to instruct the potential engineering applications. Finally, the band edge frequencies of the lower band gaps for this light EM shaft are expressed analytically using physical heuristic models.
- Note:
- 李丽霞
- First Author:
- caianjiang,lilixia
- Indexed by:
- Journal paper
- Volume:
- 卷：75
- Issue:
- 期：
- Page Number:
- 页：10501
- Translation or Not:
- no
- Date of Publication:
- 2016-07-01