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Ultra-low-frequency broadband characteristics of radial gradient supercell seismic metamaterials.

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Title: Ultra-low-frequency broadband characteristics of radial gradient supercell seismic metamaterials.
Alternate Title: 径向梯度超元胞地震超材料的甚低频超宽带的减振特性.
Authors: LI Lixia1 jieli_18@163.com, LI Yan1, LIU Haixia1
Source: Journal of Measurement Science & Instrumentation. Sep2025, Vol. 16 Issue 3, p446-455. 10p.
Subjects: Lamb waves, Surface waves (Fluids), Metamaterials, Finite element method, Base isolation system
Abstract (English): This study aims to discuss the propagation characteristics of seismic Lamb wave and surface wave in a new radial gradient supercell seismic metamaterial (RGSSM). Different from the traditional seismic metamaterials with simple unit cells, the RGSSM consists of the supercells arranged periodically along the radial direction, and these supercells are composed of five kinds of unit cells with gradient filling rates. The dispersion curve and attenuation spectrum of the Lamb wave in RGSSM are studied with the finite element method combined with the supercell technology, generating a very low-frequency ultra-wide bandgap of 3.98-20 Hz, and a forbidden band generated by the localized modes forms multi-harmonic oscillators inside the supercell. Furthermore, it is found that the Young's modulus of the soil is more sensitive to the effect of bandgap. In terms of surface wave, the RGSSM can produce rapid attenuation in the low frequency range of 5.2-8.5 Hz. Finally, a 3D model is designed to demonstrate the shielding performance of RGSSM against the seismic surface wave. The proposed RGSSM provides a new idea for the seismic isolation of ultra-wide and low-frequency seismic waves. [ABSTRACT FROM AUTHOR]
Abstract (Chinese): 针对地震兰姆（Lamb）波和面波在一种新型径向梯度超元胞地震超材料（ Radial gradient supercell seismic metamaterial, RGSSM）中的传播特性进行了研究。与传统地震超材料的简单单胞不同, RGSSM 由超元胞沿径向呈周期性排列构成, 其超元胞 由五种填充率呈梯度的单胞组成。采用有限元法结合超元胞技术研究Lamb 波在RGSSM 中的色散曲线和衰减谱, 发现有 3. 98-20 Hz 的甚低频超宽禁带生成。对特殊点的模态振型分析显示, 超宽禁带由超元胞内部形成多谐振子的局域化模态产生。 进一步研究显示, 土壤的杨氏模量对带隙效应更加敏感。对于表面波而言, RGSSM 在5. 2-8. 5 Hz 的低频范围内对Lamb 波和表 面波可产生良好的衰减效果。最后, 采用设计的三维模型展示了RGSSM 对地震表面波的屏蔽性能。本研究所提出的RGSSM 可 为超宽低频的地震波隔振提供新思路. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Measurement Science & Instrumentation is the property of Journal of Measurement Science & Instrumentation and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Label: Title
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  Data: Ultra-low-frequency broadband characteristics of radial gradient supercell seismic metamaterials.
– Name: TitleAlt
  Label: Alternate Title
  Group: TiAlt
  Data: 径向梯度超元胞地震超材料的甚低频超宽带的减振特性.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22LI+Lixia%22">LI Lixia</searchLink><relatesTo>1</relatesTo><i> jieli_18@163.com</i><br /><searchLink fieldCode="AR" term="%22LI+Yan%22">LI Yan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22LIU+Haixia%22">LIU Haixia</searchLink><relatesTo>1</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Measurement+Science+%26+Instrumentation%22">Journal of Measurement Science & Instrumentation</searchLink>. Sep2025, Vol. 16 Issue 3, p446-455. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Lamb+waves%22">Lamb waves</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+waves+%28Fluids%29%22">Surface waves (Fluids)</searchLink><br /><searchLink fieldCode="DE" term="%22Metamaterials%22">Metamaterials</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Base+isolation+system%22">Base isolation system</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: This study aims to discuss the propagation characteristics of seismic Lamb wave and surface wave in a new radial gradient supercell seismic metamaterial (RGSSM). Different from the traditional seismic metamaterials with simple unit cells, the RGSSM consists of the supercells arranged periodically along the radial direction, and these supercells are composed of five kinds of unit cells with gradient filling rates. The dispersion curve and attenuation spectrum of the Lamb wave in RGSSM are studied with the finite element method combined with the supercell technology, generating a very low-frequency ultra-wide bandgap of 3.98-20 Hz, and a forbidden band generated by the localized modes forms multi-harmonic oscillators inside the supercell. Furthermore, it is found that the Young's modulus of the soil is more sensitive to the effect of bandgap. In terms of surface wave, the RGSSM can produce rapid attenuation in the low frequency range of 5.2-8.5 Hz. Finally, a 3D model is designed to demonstrate the shielding performance of RGSSM against the seismic surface wave. The proposed RGSSM provides a new idea for the seismic isolation of ultra-wide and low-frequency seismic waves. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Chinese)
  Group: Ab
  Data: 针对地震兰姆（Lamb）波和面波在一种新型径向梯度超元胞地震超材料（ Radial gradient supercell seismic metamaterial, RGSSM）中的传播特性进行了研究。与传统地震超材料的简单单胞不同, RGSSM 由超元胞沿径向呈周期性排列构成, 其超元胞 由五种填充率呈梯度的单胞组成。采用有限元法结合超元胞技术研究Lamb 波在RGSSM 中的色散曲线和衰减谱, 发现有 3. 98-20 Hz 的甚低频超宽禁带生成。对特殊点的模态振型分析显示, 超宽禁带由超元胞内部形成多谐振子的局域化模态产生。 进一步研究显示, 土壤的杨氏模量对带隙效应更加敏感。对于表面波而言, RGSSM 在5. 2-8. 5 Hz 的低频范围内对Lamb 波和表 面波可产生良好的衰减效果。最后, 采用设计的三维模型展示了RGSSM 对地震表面波的屏蔽性能。本研究所提出的RGSSM 可 为超宽低频的地震波隔振提供新思路. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Measurement Science & Instrumentation is the property of Journal of Measurement Science & Instrumentation and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.62756/jmsi.1674-8042.2025043
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 446
    Subjects:
      – SubjectFull: Lamb waves
        Type: general
      – SubjectFull: Surface waves (Fluids)
        Type: general
      – SubjectFull: Metamaterials
        Type: general
      – SubjectFull: Finite element method
        Type: general
      – SubjectFull: Base isolation system
        Type: general
    Titles:
      – TitleFull: Ultra-low-frequency broadband characteristics of radial gradient supercell seismic metamaterials.
        Type: main
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          Name:
            NameFull: LI Lixia
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          Name:
            NameFull: LI Yan
      – PersonEntity:
          Name:
            NameFull: LIU Haixia
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            – D: 01
              M: 09
              Text: Sep2025
              Type: published
              Y: 2025
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              Value: 16
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              Value: 3
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            – TitleFull: Journal of Measurement Science & Instrumentation
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