Scholarlink

Abstract <p>To optimize the sound absorption performance of aluminum foam, a dual-porosity aluminum foam consisting of different perforation configurations is proposed. A theoretical model of the structure is established using the transfer matrix method, and a simulation model is constructed with COMSOL software. The accuracy of the results is verified through sound absorption experiments. By analyzing the sound absorption mechanism and exploring the influence of structural parameters on sound absorption performance, the results indicate that front-perforation induces a pressure diffusion effect, effectively enhancing acoustic energy dissipation and improving sound absorption. By adjusting the radius of front-perforation, a balance between the pressure diffusion effect and acoustic energy dissipation in the matrix material can be achieved, thereby maximizing sound absorption performance. When the perforation radius exceeds 7.5 mm, the sound absorption performance of aluminum foam with side perforations is significantly superior to that with front perforation. The perforation diameter on the incident surface significantly influences sound absorption, resulting in similar performance between the inverted gradient perforation dual-porosity aluminum foam (IG-DPAF) and the “I-shaped gradient” perforation dual-porosity aluminum foam, both demonstrating excellent broadband sound absorption properties with absorption coefficients exceeding 0.8 across the frequency range of 1000–6300 Hz. Conversely, the sound absorption behavior of the positively gradient perforated dual-porosity aluminum foam (PG-DPAF) resembles that of the “+shaped gradient” perforation dual-porosity aluminum foam in terms of sound absorption behavior. This study provides novel insights for the structural design and performance optimization of aluminum foam-based sound-absorbing materials<i>.</i></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

Acoustic Absorption Properties of Perforated Double-Porosity Aluminum Foam

  • 期刊论文

  • 发表日期：

    2025年8月1日

查看全文
  • J. Chen,
  • T. Li,
  • G. Ning,
  • L. Liang,
  • J. Qiao,
  • Z. Cui,
  • L. Zhang,
  • Z. Wang,
  • Z. Zhang

摘要

Abstract

To optimize the sound absorption performance of aluminum foam, a dual-porosity aluminum foam consisting of different perforation configurations is proposed. A theoretical model of the structure is established using the transfer matrix method, and a simulation model is constructed with COMSOL software. The accuracy of the results is verified through sound absorption experiments. By analyzing the sound absorption mechanism and exploring the influence of structural parameters on sound absorption performance, the results indicate that front-perforation induces a pressure diffusion effect, effectively enhancing acoustic energy dissipation and improving sound absorption. By adjusting the radius of front-perforation, a balance between the pressure diffusion effect and acoustic energy dissipation in the matrix material can be achieved, thereby maximizing sound absorption performance. When the perforation radius exceeds 7.5 mm, the sound absorption performance of aluminum foam with side perforations is significantly superior to that with front perforation. The perforation diameter on the incident surface significantly influences sound absorption, resulting in similar performance between the inverted gradient perforation dual-porosity aluminum foam (IG-DPAF) and the “I-shaped gradient” perforation dual-porosity aluminum foam, both demonstrating excellent broadband sound absorption properties with absorption coefficients exceeding 0.8 across the frequency range of 1000–6300 Hz. Conversely, the sound absorption behavior of the positively gradient perforated dual-porosity aluminum foam (PG-DPAF) resembles that of the “+shaped gradient” perforation dual-porosity aluminum foam in terms of sound absorption behavior. This study provides novel insights for the structural design and performance optimization of aluminum foam-based sound-absorbing materials.