One-Dimensional Bi-Stage Phononic Band Gap Shaft Structure for Reducing Torsional Vibration

Abstract:

In this paper, a one-dimensional bi-stage phononic band gap (PBG) structure based on double local resonant effects is presented to reduce the torsional vibration for the first time. A unit cell of the bi-stage PBG structure is composed of two harmonic LR oscillators in the radial direction, distributed periodically along the shaft. A new method, combining the transfer matrix method and the lumped-mass method is proposed to study the torsional vibration band gaps of the double PBG-like shaft theoretically and proved by the finite element method. The results show that the mid-gap frequency of the bi-stage PBG structure shaft is lower than that in the one-stage PBG shaft and the relative width of the band gaps reaches 1.3 with the average attenuation of the vibration amplitude about 40dB.

• Periodical: Applied Mechanics and Materials (Volume 141)
• Pages: 54-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.141.54
• Online since: November 2011
• Authors: Li Xia Li, Tian Ning Chen, Xiao Peng Wang, Bo Li
• Keywords: Bandgap, Low Frequency, Phononic Crystal, Torsional Vibration

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