轨道车辆用低频防护电磁防护碳纤维复合材料研制

Development of Carbon Fiber Composite Material for Electromagnetic Protection of Low Frequency Protective Parts of Light-weight Railway Vehicles

摘要: 本文针对轨道车辆电磁敏感部位低频防护设计要求，从低频电磁防护原理出发，以碳纤维复合材料为主材，并结合导电导磁的层间电磁增强材料，利用热压罐成型工艺制备了适用于轨道车辆环境下低频电磁防护碳纤维复合材料。经过测试，材料相对硅钢体系的防护材料减重效果明显，且在直流磁场和低频电磁(5 Hz~20 KHz)下，最高屏蔽效能达到30 dB。采用文章中方法制作的低频电磁防护碳纤维复合材料，具有质量轻、强度高、成型快速、屏蔽性能好、环境适应性强等优点，在智慧交通领域具有较高的工程价值。

Abstract: In this paper, according to low-frequency protection design requirements of the railway vehicle electromagnetic sensitive parts, we used the carbon fiber composite material as the main material and combined with the conductive and magnetic interlaminar electromagnetic reinforcement material based on the principle of low frequency electromagnetic protection, the electromagnetic protection carbon fiber composite material suitable for the low frequency electromagnetic pro-tection in railway vehicles was prepared by thermal pressure tank forming process. After the test, the material had the obvious weight reduction compared with the silicon steel system protection material, and the maximum shielding effect was 30 db under the dc magnetic field and the low frequency electromagnetic field (5 Hz~20 KHz). This low-frequency electromagnetic protection carbon fiber composite material had the advantages of light weight, high strength, rapid molding, good shielding performance and strong environmental adaptability, and so on. It had high engi-neering value in the field of intelligent transportation.