3D woven fabrics (3DWF) have great potential in the field of electromagnetic (EM) wave absorption with the abilities of great mechanical properties, flexible properties and structural stability. Taking 3D bidirectional angle-interlock woven fabric (3DBWF) as an example, through analyzing the representative volume unit of this fabric, the equivalent electromagnetic parameters of 3DBWF were calculated based on the strong fluctuation theory, and established an EM absorption model based on the transmission line theory. The validity of the model was verified by finite element software results and experimental results, which six kinds of 3DBWF samples were woven by carbon fibers. The results show that the higher the degree of buckling, the better the EM absorption. The EM absorption also depends on the shape of yarn cross section, fabric thickness and fiber volume fraction. This model provides theoretical guidance for the development of 3DWF in the field of wave absorption.

3D 机织织物 (3DWF) 在电磁 (EM) 波吸收领域具有巨大的潜力，具有良好的机械性能、柔韧性和结构稳定性。以3D双向角互锁机织物（3DBWF）为例，通过分析该织物的代表性体积单位，基于强涨落理论计算了3DBWF的等效电磁参数，并建立了基于透射率的电磁吸收模型。线理论。有限元软件结果和实验结果验证了模型的有效性，其中6种3DBWF样品由碳纤维编织而成。结果表明，屈曲度越高，电磁吸收越好。EM 吸收还取决于纱线横截面的形状，织物厚度和纤维体积分数。该模型为3DWF在吸波领域的发展提供了理论指导。