The Study Of Earth Penetrator Trajectory

Modern wars are becoming the so-called “finding immediately destroying” information warsunder the condition of high-tech with the developing of technology. Defense facilities under groundare able to protect people and store weapons. It has manifested specific advantages due to its fineconcealment; good shelter and great resist of destroy. As a result, the world is researching modernweapons that could attack targets underground, and it could push forward information wars to adeeper field underground. It is the right time that penetrator appeared.Currently, with seldom attention on the trajectory of a penetrator penetrated, the principle and thedepth determination is the world focused on. This paper is based on the mechanics of penetration andrigid body, focusing on the trajectory of a penetrator penetrated theoretically and numerically.First of all, we build the3-D model with stress on the penetrator on the base of the geometricmodel and on the use of DAFL as well as axial and lateral stress. We further deduce the dynamicmodel of a penetrator with initial attack angle and penetration angle. And deduce the depth of apenetrator penetrated vertically with arbitrary initial velocity on the base of CET and proposed model.On the use of simulation, we analyze the effect of friction on the depth of penetration.Secondly, we realize the combination of theoretical and numerical method on the use of LIMwith the aid of ABAQUS and VDLOAD. In the combination, we firstly program CET in FORTRANlanguage, and then, invoke the program by ABAQUS to calculate the process of penetration.Finally, on the background of penetrator with high-velocity and hyper-velocity that carried bynormal and ballistic missile, we research the trajectory of a penetrator penetrated with various initialpenetration angle and attack angle. We conclude and summarize the laws of trajectories and overloadwith various initial penetration conditions on the base of simulation result and further propose theinitial condition under which a penetrator could have a relative small load and stabilized trajectory.