工艺与制造英文2024
基于3D打印设计的天然纤维增强复合材料微穿孔板声学性能研究
Acoustic properties of natural fiber reinforced composite micro-perforated panel designed using 3D printing
Umberto Berardi · Toronto Metropolitan Univ., 350 Victoria St., Toronto, ON M5B 2K3, Canada, uberardi@ryerson.ca
摘要整理
本研究采用3D打印技术制备天然纤维增强复合材料（NFRC）微穿孔板（MPP）吸声体，并系统研究其声学性能。研究创新之处在于建立了一套优化MPP生产工艺的方法学体系，通过消除传统制造工艺中的手工准备和压制等问题，实现了具有竞争力的成本控制。采用FDM 3D打印技术以PLA/软木木复合材料为原料制备试样。利用双麦克风阻抗管装置测量了不同穿孔直径、厚度和穿孔率的MPP试样的声吸收系数。采用Maa解析模型预测声吸收性能，并基于平均声吸收系数和样品制造总成本，采用响应面法中心组合设计（RSM-CCD）对试样进行优化。进一步测试了MPP双层平行排列和MPP与剑麻多孔材料复合结构对吸声性能的改善效果。研究结果表明，NFRC-MPP吸声体的平均声吸收系数比传统MPP吸声体提高了25%，为天然纤维复合材料在声学功能材料领域的应用提供了新的思路。
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