关键词: 兵器科学与技术, 双锥罩, 射流, 侵彻, 冲击波, 双虚拟原点

Abstract: In order to describe the whole process of biconical liner jet penetrating into steel target, Bernoulli equation is modified by using shock wave Hugoniot relationship. Double virtual origin is deduced by combining the improved PER theory, and then a penetration depth theoretical model is established by considering the factors of shock wave, jet velocity distribution and jet state. The accuracy of forecasting the penetration depth is improved using the calculation models of shock wave, double virtual origin and jet fracture effect. The influences of demarcation points on penetration depth are compared, and the rules of stand-off distance and biconical liner structural parameters influencing the penetration depth are obtained. The results show that the demarcation point of continuous and break-up jets occurs earlier than the demarcation point of shock wave effect with the increase in stand-off distance. Moreover, the tip velocity, inflection velocity and penetration depth decrease with the increase in top cone angle. But with the increase in height radio of top cone, the tip velocity and penetration depth increase gradually, and the inflection velocity exhibits a descendant trend.

Key words: ordnance science and technology, biconical liner, jet, penetration, shock wave, double virtual origin