等效模型误差对蜂窝吸波结构设计结果的影响

Effects of Error of Equivalent Models on the Optimum Design Results of Honeycomb Radar Absorber

使用等效模型可以大大简化蜂窝吸波结构的设计复杂度,但等效模型的误差会对设计的结果产生影响。基于单轴各向异性介质中的电波传播理论和粒子群优化算法,通过定义更符合实际的随频率变化的相对误差,对不同情况下Hashin-Shtrikman(HS)模型的误差对蜂窝吸波结构优化设计结果的影响进行研究。结果表明,HS模型的误差会在一定程度上影响蜂窝吸波结构的优化结果,特别是当电磁波斜入射时,由于纵向传播常数受到横向等效模型误差的影响较大,而受到纵向等效模型的影响较小,所以优化结果也主要受到横向等效模型误差的影响。

Using the equivalent model can simplify the design of honeycomb structure radar absorber, but the error of the equivalent model will have an impact on the result of design. By using the electromagnetic wave propagation theory in uni- axial anisotropic media and particle swarm optimization algorithm, and defining a more realistic relative error model, this pa- per analyses the effects of error of the HS equivalent model on honeycomb structure radar absorber optimization results. The results show that the error of equivalent model will affect the optimization results. And for the oblique incident electromagnet- ic wave, the transverse equivalent model error has greater influence on the longitudinal propagation constant and the optimiza- tion results than the longitudinal equivalent model error.