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摘要:Researches in Acoustic Black Hole(ABH) structures are attractive for potential applications in broadband vibration suppression and wave manipulation. The remarkable functions of an ABH element are limited below the cut-on frequency, above which the broadened ABH effect can be effectively obtained. The mid-to-low application challenges the ABH structure without large dimensions. In this work, the band structures of periodical two-dimensional(2D) ABH without additional damping material were investigated. The simulation results show that periodic 2D ABHs can achieve directional flexural wave bandgaps(DFBGs) below the cut-on frequency of ABH cell.The analysis results of eigenmodes show that the generation of multiple DFBGs is dominated by the ABH-induced localized vibration at multiple frequencies. The effect of lattice constant and key parameters of the ABH on the DFBGs is also explored to indicate the bandgap adjustment rules.The bandgap analysis enriches the existing knowledge on periodic 2D ABH structures and offers a design guideline of bandgap behaviors in a 2D ABH plate.
会议名称:

第八届国际振动工程会议

会议时间:

2021-07-24

会议地点:

中国上海

  • 专辑:

    基础科学

  • 专题:

    物理学

  • DOI:

    10.26914/c.cnkihy.2021.016518

  • 分类号:

    O42

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