钨锆铪合金活性破片对间隔靶耦合毁伤特性

Damage Characteristics of W-Zr-Hf Alloy to Spaced Targets

为研究高强度、高密度钨锆铪活性合金破片在冲击加载下的化学能增强动能毁伤能力,开展弹道炮驱动破片对单层Q235钢板和钢板后加3层LY12薄铝板间隔靶的侵彻实验。采用高速摄影机拍摄破片侵彻钢板后的释能行为和对间隔靶的毁伤过程,测得钢板后碎片云区的形状和运动特征参数,得到碎云区对钢板后不同位置处间隔靶的毁伤面积和容积。研究结果表明:钨锆铪合金活性破片在高速侵彻钢板过程中,板前化学能耗极低,板后则形成类椭球状兼有动能和化学能的耦合能量区,该能量区对间隔靶的毁伤模式在激活点近场区以化学能增强动能毁伤为主,在远场区以动能毁伤为主;单枚直径9.5 mm破片对距钢板125 mm和360 mm位置处的间隔靶毁伤容积分别可达292.7 cm^(3)和331.5 cm^(3).

The chemical energy of tungsten-zirconium-hafnium(W-Zr-Hf)active alloy fragments with high strength and high density under impact loading is studied to enhance the kinetic energy damage capability.A ballistic gun-driven fragment penetration experiment was carried out on a single-layer Q235 steel plate and a spaced target(three-layer LY12 thin aluminum plate)behind the steel plate.The energy release behavior and damage process of the fragment after penetrating the steel plate were photographed by using a high-speed photography system.The shape and motion characteristic parameters of fragment cloud behind the steel plate were measured,and the damage area and volume of fragment cloud to the spaced targets at different positions behind the steel plate were obtained.The results show that the chemical energy consumption of tungsten zirconium hafnium alloy active fragments is extremely low in front of the plate during high-speed penetration into steel plates,and a coupling energy region with kinetic energy and chemical energy is formed behind the plate,which has an ellipsoidal shape.The damage mode of the spaced target in the energy region is mainly the enhanced kinetic energy damage of chemical energy in the near-field region of activation point,while kinetic energy damage is mainly in the far-field region.The damage volume of a single fragment with a diameter of 9.5 mm can reach 292.7 cm^(3) and 331.5 cm^(3) for the spaced targets at 125 mm and 360 mm away from the steel plate,respectively.