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This study presents three star-shaped chiral structures (SSSR, SDSR, SQSR) with integrated spiral resonators at their ligaments, categorized by resonator count (single, double, quadruple). All configurations generate multiple omnidirectional bandgaps below 1000 Hz. Incorporating a central lead disk enhances bandgap coverage for SSSR (86.13%) and SDSR (89.31%), with coverage increasing proportionally to disk radius. SQSR shows minimal bandgap variation (peak 87.31%) under similar modifications. Vibrational mode analysis confirms spiral resonator resonance as the primary mechanism for elastic wave attenuation. Phase constant surface simulations and directional wave propagation studies validate localized elastic wave characteristics. Bandgap ranges align with vibration attenuation curves, yielding peak attenuations of 795, 822, and 1525 for SSSR, SDSR, and SQSR, respectively. Stress field analysis further corroborates the structures’ vibration suppression capacity. Featuring lightweight construction and scalable fabrication, these designs demonstrate robust low-frequency vibration reduction (< 1000 Hz), providing a versatile solution for multi-frequency noise control in engineering applications.

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Wave Propagation Mechanism Analysis and Vibration Reduction Performance of Novel Star-Shaped Chiral Metamaterial with Ultra-high Bandgap Coverage in Low-Frequency

  • 会议论文

  • 发表日期：

    2026年

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  • Bin Wang,
  • Qi Li,
  • Keqing Xu,
  • Yongtao Sun,
  • Shuo Wang,
  • Anshuai Wang,
  • Zhaozhan Zhang

摘要

This study presents three star-shaped chiral structures (SSSR, SDSR, SQSR) with integrated spiral resonators at their ligaments, categorized by resonator count (single, double, quadruple). All configurations generate multiple omnidirectional bandgaps below 1000 Hz. Incorporating a central lead disk enhances bandgap coverage for SSSR (86.13%) and SDSR (89.31%), with coverage increasing proportionally to disk radius. SQSR shows minimal bandgap variation (peak 87.31%) under similar modifications. Vibrational mode analysis confirms spiral resonator resonance as the primary mechanism for elastic wave attenuation. Phase constant surface simulations and directional wave propagation studies validate localized elastic wave characteristics. Bandgap ranges align with vibration attenuation curves, yielding peak attenuations of 795, 822, and 1525 for SSSR, SDSR, and SQSR, respectively. Stress field analysis further corroborates the structures’ vibration suppression capacity. Featuring lightweight construction and scalable fabrication, these designs demonstrate robust low-frequency vibration reduction (< 1000 Hz), providing a versatile solution for multi-frequency noise control in engineering applications.