| 马建刚,耿明昕,吴健,王逸航,申晨,翟国庆.靶向吸收电力设备有调噪声的声学超构材料设计与实验研究*[J].,2025,43(3):572-579 |
| 靶向吸收电力设备有调噪声的声学超构材料设计与实验研究* |
| Design and experimental study of acoustic metamaterials for targeted absorption of tonal noise from electrical equipment |
| 投稿时间：2023-11-20 修订日期：2025-04-27 |
| 中文摘要: |
| 变压器等电力设备工作频率为50Hz，其通过铁心振动辐射的噪声声能以100Hz及其谐波频率为主。在厚度受限的情况下，传统吸声材料在上述低频处难以达到理想吸声效果。为高效吸收电力设备辐射的噪声，本文提出了一种空间卷曲型声学超构材料，通过引入通道长度分别为680mm和320mm，厚度分别为30mm和20mm，宽度分别为13.2mm和13mm的2个直角回旋式迷宫通道，实现对100Hz和200Hz噪声的准完美吸声，仿真结果表明其吸声系数分别可达0.91和0.99。通过实验验证了理论和仿真模型的准确性。将两种吸声单元两两组合，在平面上拓扑排列，可同时高效吸收100Hz和200Hz噪声。该超构材料可广泛应用于变电站或变配电间吸声，有效降低室内低频噪声污染。 |
| 英文摘要: |
| The operating frequency of electrical equipment such as transformers is 50Hz, and the sound energy radiated through the core vibration concentrates on 100Hz and its harmonics. Under the limitation of thickness, the traditional resonant acoustic structure is difficult to achieve an ideal absorption coefficient at low frequency above. In this study, a coiled-up acoustic metamaterial is proposed to achieve quasi-perfect sound absorption for 100 Hz and 200 Hz noise by introducing two right-angle gyratory labyrinth channels with the channel lengths of 680 mm and 320 mm, the thicknesses of 30 mm and 20 mm, and the widths of 13.2 mm and 13mm, respectively. Simulation results show that the absorption coefficients of these two kinds of sound absorption units are 0.91 and 0.99, respectively. The accuracy of theoretical and simulated models was verified by an experiment. At the same time, these two kinds of sound-absorbing units can be combined in pairs and further topologically arranged in plane to effectively absorb noise of 2 frequencies. The achievements of this study can be widely used in the sound absorption of transformer substations and power transformation and distribution rooms to effectively reduce low-frequency noise pollution. |
| DOI：10.11684/j.issn.1000-310X.2025.03.005 |
| 中文关键词: 电力设备 变配电 有调噪声 超构材料 吸声 |
| 英文关键词: Electrical equipment Power transformation and distribution Tonal noise Acoustic metamaterial Sound absorption |
| 基金项目:输变电工程低频噪声预测及控制关键技术开发与应用研究 |
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