Scholarlink

The noise generated by drones during cruising has attracted considerable attention, and the traditional double-layer micro-perforated panel structure has been widely used for sound absorption. In order to broaden the absorption bandwidth, this study integrates Helmholtz resonators into the double-layer micro-perforated panel structure. We investigated the effects of the proportion of Helmholtz resonators embedding, neck structure parameters, and micro-perforated panel pore size on the absorption bandwidth. Two structures were proposed: the micro-perforated panel structure embedded with a single Helmholtz resonator and the micro-perforated panel structure embedded with four integrated Helmholtz resonators. By employing the particle swarm optimization algorithm, the bandwidth was further improved. Theoretical and finite element simulation results demonstrate that, compared to the traditional double-layer micro-perforated panel structure, the absorption bandwidths increased by 48.15% and 55.05%, respectively.

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

Enhancing Broadband Noise Reduction: Design Optimization and Simulation Analysis of Helmholtz Resonator-Integrated Double-Layer Micro-perforated Panel Structures

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Qi Li,
  • Jinwu Wu

摘要

The noise generated by drones during cruising has attracted considerable attention, and the traditional double-layer micro-perforated panel structure has been widely used for sound absorption. In order to broaden the absorption bandwidth, this study integrates Helmholtz resonators into the double-layer micro-perforated panel structure. We investigated the effects of the proportion of Helmholtz resonators embedding, neck structure parameters, and micro-perforated panel pore size on the absorption bandwidth. Two structures were proposed: the micro-perforated panel structure embedded with a single Helmholtz resonator and the micro-perforated panel structure embedded with four integrated Helmholtz resonators. By employing the particle swarm optimization algorithm, the bandwidth was further improved. Theoretical and finite element simulation results demonstrate that, compared to the traditional double-layer micro-perforated panel structure, the absorption bandwidths increased by 48.15% and 55.05%, respectively.