Numerical Simulation Of Titanium Alloy Shaped Charge Penetrating Runway

In modern military warfare, air superiority is particularly important. And attacking and destroying the airport is one of the effective means of the air superiority, thus the runway become the target of attacks due to its own characteristics. Currently, the warheads which could attack the runway class rugged target are kinetic energy penetration warhead and series composite penetration warhead. The penetration warheads have been widely used because of their good performance of damage. Studying new materials of liner is one way to improve the penetration capabilities. In order to get a larger aperture at the premise of a right wear, the article studies the formation of the shaped charge jet and the process of the runway damage with the titanium alloy as a shaped charge liner material and using the theoretical analysis and numerical simulation.The results show that,(1)Comparing with the copper jet and the aluminum jet, the penetration depth of the titanium alloy jet is higher than that of the aluminum, and the penetration aperture of the titanium alloy jet is bigger than that of the copper.(2)The penetrating pore of the jet of the arc-cone liner combined the advantages of two traditional structures of shaped and could consider the requirements about both penetration aperture and the depth of the hole at the same time.(3)For the arc cone cover with80mm caliber, when the shaped charge liner cone angle is70°,the aspect ratio is betweenl.2～1.4,the wall thickness is between3.2～4.0mm,，the radius of curvature is between20～28mm,the detonation mode is the detonation in center and the ring initation with smaller diameter of detonation ring, it would form a good performance rod jet.(4)For the explosive charge of a certain equivalent, the runway damage effect become first increasing then decreasing with the increasing depth of burst point. The best blast depth for1.1kg HMX cylindrical charge is550mm.(5)When the bombing height varies between1.5Dand2.5D,the penetration depth of the arc cone cover jet on the runway target increases, and the effect is better at160-180mm. The results could provide a reference for the design of the shaped charge warhead, the research of the titanium alloy penetrator and the damage to the multilayer dielectrics.