纤维复合材料的电磁反射系数计算

Calcultion of the Reflection Coeffiecient of Fiber Composite Materials

为了探讨用于制造飞机的纤维复合材料的电磁特性,运用等效层模型分析了纤维复合材料的等效电磁参数,利用传输线理论推导了材料的反射系数计算公式并计算了不同参数下材料的反射系数。将计算结果与有限元方法对实际材料的数值计算结果进行了比较,发现在材料结构周期(纤维间距)远小于波长时,等效层模型的计算结果与有限元法的结果吻合良好。

In order to investigate the electromagnetic characterization of fiber composite materials commonly used in aircraft, the electromagnetic parameters of fiber composite materials were analyzed with equivalent-layer model. The formula of the reflection coefficient was deduced using the transmission line theory, and the reflection coefficient of the materials was calculated with different parameters. By comparing the results obtained from the equivalentlayer model with finite element results, we find that the two solutions are in consistent with each other when the period（fiber interval） is far smaller than the wavelength.