复合材料三明治结构板的电磁和冲击性能分析

Analysis of Electromagnetic and Shock Wave Mitigation Capability of a Novel Sandwich Plate with Composites

为开发兼有反雷达侦察及减缓冲击波对乘员伤害能力的新型装甲板,设计了一种上面板、核层和下面板分别为玻璃纤维复合材料、聚氨酯/多壁碳纳米管复合材料功能梯度泡沫和碳纤维复合材料的全新三明治结构,该结构既能吸收电磁波又能阻隔冲击波的传递;建立了该结构的电磁波反射和冲击波透射理论模型,考察泡沫核层梯度模式和层厚对电磁波反射系数和冲击波透射系数的影响,并采用NSGA-Ⅱ算法对装甲板结构参数进行多目标优化.结果表明,优化后该结构的电磁波反射系数降低了94.58%,冲击波透射系数降低了4.35%,说明其具有良好的电磁波吸收能力和冲击波阻隔能力.

In order to develop a novel vehicular armor plate against radar surveillance systems and blast attack har- ming occupants, by adopting the glass fiber composite, the functionally-graded polyurethane foams filled with multi- walled carbon nanotubes （MWCNT） and the carbon fiber composite to respectively make the top surface, the core and the back surface, a novel sandwich plate is designed, which can absorb electromagnetic （EM） waves and attenuate the shock wave transmission. Then, the analytical models of the EM reflection and the shock wave trans- mission are developed for the novel structure, and the effects of the gradient pattern and thickness of each dielectric layer on the EM reflection coefficient and the shock wave transmission coefficient are investigated. Moreover, the NSGA-il algorithm is used to conduct a multi-objective optimization of structure parameters of armor plate. The results show that, after the optimization, the electromagnetic wave reflection coefficient and shock wave transmission coefficient of the novel structure decrease respectively by 94.58% and 4.35% , which means that the EM absorbing ability and shock wave attenuation ability of the novel structure are both excellent.