摘要
研究单根碳纤维的电磁散射特性,如何改善碳纤维的吸波性能,是碳纤维复合吸波材料的难点问题。为上述问题,提出用圆柱体模型模拟碳纤维,根据三维电磁场有限元(FEM)算法,当平面波激励时,采用四面体棱边元网格划分及辐射边界条件以及矩阵方程组的自适应迭代算法,在AnsoftHFSS仿真平台上模拟了碳纤维的电场散射特性,获得了单根碳纤维的电场散射图。结果表明,在合适的长径比范围内,碳纤维与入射波产生强烈的谐振,碳纤维的电导率、轴向和入射波频率对其电磁波散射均有重要影响。仿真结果对设计具有强吸波性能的短切碳纤维复合吸波材料具有参考价值。
In the research of absorbing composite materials,the diffcult problem is how to study the scattering of electromagnetic wave for single carbon fiber.To solve this problem,the single carbon fiber is simulated with the cylinder model.According to three-dimensional finite element（FEM） algorithm,during plane waves excitation,tetrahedral edge element mesh,radiation boundary conditions and the adaptive iterative algorithm of matrix equations are used to simulate the scattering of electric field of short carbon fiber based on Ansoft HFSS simulation platform,and the maps of electric field scattering are visible.The results show that carbon fibers have strong resonance with the incident wave at appropriate aspect ratio,and its orientation,electrical conductivity and the frequency of the incident wave have an important effect on its electromagnetic scattering.Simulation results have great significance for the preparation of carbon fiber composite absorbing material with strong absorbing properties.
出处
《计算机仿真》
CSCD
北大核心
2011年第5期139-143,共5页
Computer Simulation
基金
国防预研基金(基金项目号:51310060101)
关键词
三维电磁场有限元法
碳纤维
电磁散射
Three-dimensional electromagnetic field FEM
Carbon fiber
Electromagnetic scattering
