Published
2026-09-30
Section
Articles
How to Cite
3D打印多孔声屏障材料吸声特性研究
聂 文强
扬州大学 土木与交通学院
覃 婷
扬州大学 土木与交通学院
李 波
扬州大学 土木与交通学院
段 盛瀚
扬州大学 土木与交通学院
邵 洁
扬州大学 土木与交通学院
DOI: https://doi.org/10.59429/xdjtjs.v8i3.15382
Keywords: 3D 打印；多孔砂浆；聚乳酸；声屏障；吸声系数
Abstract
为比较 3D 打印多孔砂浆、聚乳酸（PLA）多孔结构与岩棉、泡沫铝的法向入射吸声特性，依据 GB/T 18696.2— 2002，采用双传声器传递函数法，通过阻抗管对同批试件的法向入射吸声系数进行测试与整理。四类试件名义厚度 均为 50 mm，大、小管试件直径分别为 100 mm 和 29 mm，数据处理不对缺失频点进行插值。多孔砂浆的有效测试 范围为 100～2000 Hz，其余三类材料为 100～5000 Hz。结果表明，多孔砂浆在 700 Hz 处的吸声系数达到 0.93，并 在 630～800 Hz 形成较集中的中频响应；PLA 自 1600 Hz 后逐步增强，5000 Hz 处达到 0.88 ；泡沫铝在 2500 Hz 处达到 0.94，岩棉则随频率升高逐渐增大，在 5000 Hz 处达到 0.87。四类材料的优势频段并不相同。3D 打印结构可 通过孔道和腔体参数调整频谱响应，适合结合交通噪声频谱开展材料选配与分区布置。阻抗管结果用于材料级频谱 比较，不能直接等同于足尺声屏障的现场插入损失。
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