Scholarlink

<p>This study reports the development of an acoustic metamaterial composed of re-entrant auxetic utilizing a 3D printing technique and provides a detailed analysis of its design and characteristics. The metamaterial was experimentally tested using a sound impedance tube to evaluate its sound absorption properties. Thermoviscous simulations facilitated a more detailed understanding of the effects of geometric parameters on the absorption coefficient, offering important insights for tailoring the metamaterial for specific frequency control. A comprehensive examination was carried out to investigate the influence of geometric variables, including strut thickness, vertical strut length, inclined strut length, re-entrant angle and number of cells along the thickness, on the acoustic characteristics of the metamaterial. By raising the thickness of the strut while keeping the other parameters constant, the absorption coefficient decreased across all frequencies. Additionally, increasing the length of the vertical and inclined struts in the cell caused the reaction to shift towards lower frequencies. The augmentation in the number of cells resulted in an increase in the sound absorption coefficient and shifting of the response towards the lower frequencies. Sound Absorption Coefficient of 0.8 to 1 was measured in this metamaterial with thickness ranging from 30 to&#xa0;35 mm.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Performance Evaluation of a 3D Printed Auxetic Structure Based Acoustic Metamaterial

  • 期刊论文

  • 发表日期：

    2025年4月22日

查看全文
  • Saliq Shamim Shah,
  • Daljeet Singh,
  • J. S. Saini,
  • Naveen Garg,
  • Chitra Gautam

摘要

This study reports the development of an acoustic metamaterial composed of re-entrant auxetic utilizing a 3D printing technique and provides a detailed analysis of its design and characteristics. The metamaterial was experimentally tested using a sound impedance tube to evaluate its sound absorption properties. Thermoviscous simulations facilitated a more detailed understanding of the effects of geometric parameters on the absorption coefficient, offering important insights for tailoring the metamaterial for specific frequency control. A comprehensive examination was carried out to investigate the influence of geometric variables, including strut thickness, vertical strut length, inclined strut length, re-entrant angle and number of cells along the thickness, on the acoustic characteristics of the metamaterial. By raising the thickness of the strut while keeping the other parameters constant, the absorption coefficient decreased across all frequencies. Additionally, increasing the length of the vertical and inclined struts in the cell caused the reaction to shift towards lower frequencies. The augmentation in the number of cells resulted in an increase in the sound absorption coefficient and shifting of the response towards the lower frequencies. Sound Absorption Coefficient of 0.8 to 1 was measured in this metamaterial with thickness ranging from 30 to 35 mm.