王蔚浩, 林永水, 刘昊宇, 等. 基于螺旋声学黑洞的环肋圆柱壳减振技术仿真分析[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.03969.
引用本文: 王蔚浩, 林永水, 刘昊宇, 等. 基于螺旋声学黑洞的环肋圆柱壳减振技术仿真分析[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.03969.
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WANG W H, LIN Y S, LIU H Y, et al. Investigation on vibration reduction performance of spiral acoustic black hole for ring-stiffened cylindrical shell[J]. Chinese Journal of Ship Research(in Chinese). DOI: 10.19693/j.issn.1673-3185.03969.
Citation: WANG W H, LIN Y S, LIU H Y, et al. Investigation on vibration reduction performance of spiral acoustic black hole for ring-stiffened cylindrical shell[J]. Chinese Journal of Ship Research(in Chinese). DOI: 10.19693/j.issn.1673-3185.03969.
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基于螺旋声学黑洞的环肋圆柱壳减振技术仿真分析

Investigation on vibration reduction performance of spiral acoustic black hole for ring-stiffened cylindrical shell

    摘要
  • 摘要:
    目的 旨在研究螺旋声学黑洞（SABH）对环肋圆柱壳的振动抑制特性的影响，为环肋圆柱壳的减振设计提供新的技术途径。
    方法 研究建立布置SABH的环肋圆柱壳有限元计算模型，计算分析结构固有频率和振动响应特性，并进一步探究SABH布置位置、螺旋长度和数量对环肋圆柱壳振动抑制的影响规律。
    结果 结果显示，单个SABH布置在腹板上，腹板各均方振速级的峰值均有显著降低，第1阶共振峰值降低可达6 dB以上，其他共振峰均降低13 dB以上；而布置在外壳上，外壳各均方振速级的峰值降低8 dB以上。增大螺旋长度和增加SABH数量可进一步提高SABH的减振效果。
    结论 研究表明，SABH对环肋圆柱壳固有频率的影响极小，同时具有优异的低频宽带减振性能。

     

    Abstract:
    Objective This paper seeks to investigate the vibration reduction characteristics of a spiral acoustic black hole (SABH) on a ring-stiffened cylindrical shell and provide a new technical approach for the vibration reduction design of ring-stiffened cylindrical shells.
    Method First, a finite element computational model of a ring-stiffened cylindrical shell with an SABH arrangement is constructed, and its structural natural frequency and vibration response characteristics are calculated and analyzed. The influence of the SABH arrangement position, helix length, and number on the vibration suppression of the ring-stiffened cylindrical shell is also investigated.
    Results The results show that with a single SABH arranged on the web, the resonance peak of each mean-square velocity （MQV） of the web is significantly reduced, with the first-order resonance peak reduced by 6 dB or more, the other resonance peaks reduced by 13 dB or more, and the peak value of each MQV of the shell reduced by 8 dB or more. Increasing the helix length and number of SABHs can further improve the vibration reduction effect.
    Conclusion SABHs have a minimal effect on the natural frequency of ring-stiffened cylindrical shells and deliver excellent low-frequency broadband vibration reduction performance.

     

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