活性杆条杀伤增强器抛撒行为数值模拟

针对杀伤增强器爆轰驱动活性杆条问题,在AUTODYN-3D平台下采用数值模拟方法研究了杆条排布方式、杆条排布半径和缓冲材料对杀伤增强器爆轰驱动活性杆条行为的影响特性。结果表明,内外层活性杆条径向排布夹角为11.25°,内层杆条排布半径不小于37 mm,外层杆条排布半径不大于85 mm时可以避免活性杆条间相互碰撞,有效保护活性杆条结构和提高活性杆条稳定性;随内层杆条排布半径增加,内层杆条承载爆轰压力显著下降;聚苯乙烯、聚乙烯和聚氨酯都具有良好的缓冲作用,与聚苯乙烯和聚乙烯相比,杀伤增强器采用聚氨酯作缓冲材料,其杆条速度振荡幅度小、收敛快,且杆条空间分布较好。

Numerical Simulation of Deployment Behaviors of Reactive Rod Used in Lethality Enhancement Device

The numerical simulation of lethality enhancement device of explosively drive reactive rods was carried out to investigate the effect caused by the arrangement mode, arrangement radius and buffer materials. Results show that the collision between reactive rods can be effectively avoided and the stability significantly enhanced when the angle between the radial arrangement of two layers is 11.25° and the radiuses of outer and inner layers are < 85 mm and >37 mm, respectively. The pressure that inner layer rods bear decreases with the increase of arrangement radius. All of the polystyrene, polyethylene and polyurethane can be used as buffer material in the lethality enhancement device, but the scope of velocity of these rods is smaller, the convergence is faster and the spatial distribution is better when polyurethane is used.