中国物理B ›› 2018, Vol. 27 ›› Issue (12): 126301-126301.doi: 10.1088/1674-1056/27/12/126301

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Simulation and experimental investigation of low-frequency vibration reduction of honeycomb phononic crystals

Han-Bo Shao(邵瀚波), Guo-Ping Chen(陈国平), Huan He(何欢), Jin-Hui Jiang(姜金辉)   

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2018-08-08 修回日期:2018-09-27 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Guo-Ping Chen E-mail:gpchen@nuaa.edu.cn
  • 基金资助:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. NS2017003).

Simulation and experimental investigation of low-frequency vibration reduction of honeycomb phononic crystals

Han-Bo Shao(邵瀚波), Guo-Ping Chen(陈国平), Huan He(何欢), Jin-Hui Jiang(姜金辉)   

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2018-08-08 Revised:2018-09-27 Online:2018-12-05 Published:2018-12-05
  • Contact: Guo-Ping Chen E-mail:gpchen@nuaa.edu.cn
  • Supported by:

    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. NS2017003).

摘要:

The honeycomb phononic crystal displays good performance in reducing vibration, especially at low frequency, but there are few corresponding experiments involving this kind of phononic crystal and the influence of geometric parameters on the bandgap is unclear. We design a honeycomb phononic crystal, which is assembled by using a chemigum plate and a steel column, calculate the bandgaps of the phononic crystal, and analyze the vibration modes. In the experiment, we attach a same-sized rubber plate and a phononic crystal to a steel plate separately in order to compare their vibration reduction performances. We use 8×8 unit cells as a complete phononic crystal plate to imitate an infinite period structure and choose a string suspension arrangement to support the experiment. The results show that the honeycomb phononic crystal can reduce the vibrating plate magnitude by up to 60 dB in a frequency range of 600 Hz-900 Hz, while the rubber plate can reduce only about 20 dB. In addition, we study the effect of the thickness of plate and the height and the radius of the column in order to choose the most superior parameters to achieve low frequency and wide bandgap.

关键词: honeycomb phononic crystal, reducing vibration, bandgap

Abstract:

The honeycomb phononic crystal displays good performance in reducing vibration, especially at low frequency, but there are few corresponding experiments involving this kind of phononic crystal and the influence of geometric parameters on the bandgap is unclear. We design a honeycomb phononic crystal, which is assembled by using a chemigum plate and a steel column, calculate the bandgaps of the phononic crystal, and analyze the vibration modes. In the experiment, we attach a same-sized rubber plate and a phononic crystal to a steel plate separately in order to compare their vibration reduction performances. We use 8×8 unit cells as a complete phononic crystal plate to imitate an infinite period structure and choose a string suspension arrangement to support the experiment. The results show that the honeycomb phononic crystal can reduce the vibrating plate magnitude by up to 60 dB in a frequency range of 600 Hz-900 Hz, while the rubber plate can reduce only about 20 dB. In addition, we study the effect of the thickness of plate and the height and the radius of the column in order to choose the most superior parameters to achieve low frequency and wide bandgap.

Key words: honeycomb phononic crystal, reducing vibration, bandgap

中图分类号:  (Phonons in crystal lattices)

  • 63.20.-e
63.20.D- (Phonon states and bands, normal modes, and phonon dispersion)