极间弹体偏转电磁力的影响因素仿真研究

Simulation study on influence factor of electromagnetic deflection of projectile between polar plates

[目的]利用极间弹体偏转电磁力使来袭射弹偏转是一项新兴的武器装备防护手段。为研究线电流理论计算偏转电磁力的适应性及偏转电磁力的影响因素,[方法]首先,建立弹体电磁装甲(PEMA)的线电流理论,采用有限元方法对简化线电流模型和三维结构进行仿真;然后,通过改变参数和拟合方法来分析极板参数、弹体击穿位置、弹体侵彻角等因素对偏转电磁力的影响规律。[结果]结果表明:三维结构的偏转电磁力仅为线电流理论电磁力的1/7,故线电流理论并不适用于指导三维电磁装甲设计;偏转电磁力随极板宽度的增加呈一次幂函数衰减;偏转电磁力横向分量在横向和纵向方向上的击穿位置均呈二次函数变化;侵彻角对偏转电磁力横向分量没有影响。[结结论]研究结论可为电磁装甲的机理实验、方案设计及装舰应用奠定一定的技术基础。

[Objectives]Deflecting an incoming projectile using electromagnetic force on the projectilebody between polar plates is a creative protection method for weapons and equipment. In order to study theadaptability of the wire current theory and the influence factor of the deflecting electromagnetic force,[Methods]the wire current theory of electromagnetic force is established and a simplified model and 3 Dmodel simulated on the basis of the finite element method. Using changing simulation parameters and afitting method,the electromagnetic force variation is then studied under the influence of such factors as thegeometric parameters of the plates,impact location and penetration angle of projectile. [Results]Theobtained results are as follows：the deflecting electromagnetic force in the 3 D simulation is only 1/7 that ofthe wire current model, so the wire current theory is not suitable for the 3 D design of passiveelectromagnetic armor;the electromagnetic force decreases with the width of the plates in accordance withthe power function law;the lateral deflecting electromagnetic force has a quadratic function with theimpact location in the transverse and lateral directions;and the penetration angle has little impact on thelateral deflecting electromagnetic force.[Conclusions]The results of this paper can provide a foundationfor the mechanism experiments,conceptual design and ship application of passive electromagnetic armor.