EFP水中飞行特性及侵彻间隔靶的仿真与试验研究

针对爆炸成型弹丸(EFP)战斗部在水下弹药的应用问题,利用LS-DYNA有限元软件,仿真研究了EFP在水中的速度衰减与质量损失规律及对不同距离的间隔靶侵彻规律,并通过高速摄影试验进行了试验验证。结果表明,EFP入水后形态极不稳定,质量急剧减小甚至碎裂,随着在水中飞行距离的增加质量逐渐减少至初始质量的1/3~1/5,EFP在水中速度先以线性下降后呈指数规律衰减,且EFP飞行2.5倍装药直径距离可贯穿5 mm靶板,但是EFP飞行超过5倍装药直径时已不具有侵彻能力。

Numerical Simulation and Experimental Study on Flight Characteristics and Penetration Against Spaced Targets of EFP in Water

Aiming at the applied problem in underwater munitions of explosively formed projectile(EFP) warhead, the rule of velocity attenuation, mass loss and penetration ability against spaced targets under different distance conditions of EFP in water was simulated and studied by the LS-DYNA finite element software. The test verification was carried out by a high-speed photography. Results show that the configuration of EFP after entering water is unstable. The mass of EFP is sharply decreased, even leads to fragmentation. With increasing the traveling distance of EFP in water, the mass of EFP is reduced to 1/3~1/5 of initial mass. The velocity of EFP in water decreases linearly at first and then decays exponentially. The EFP of traveling the 2.5 times charge diameter distance can penetrate the 5 mm target plate, but the EFP of traveling the 5 times more than charge diameter distance has no penetration ability.