摘要
Abstract
To investigate the effects of projectile diameter and dislocation distance on the penetration depth and deflection behav-ior of subsequent projectiles during multi-projectile dislocated sequential penetration into a semi-infinite target,a theoretical model and numerical simulation model for the penetration depth of concrete targets under dislocated sequential penetration by multiple projectiles were established.Experimental tests on multi-projectile dislocated sequential penetration were conducted to validate the reliability of the models.The results show that the penetration depth and deflection angles calculated from theoreti-cal and numerical models agree well with experimental data,with maximum deviations of 6.7%and 9.0%,respectively.There exists a range of dislocation distances for multi-projectile penetration,where the lower limit L1 represents the maximum dislocat-ed distance at which subsequent projectiles deflect without entering the preceding projectile's trajectory,and the upper limit L2 denotes the minimum dislocated distance at which subsequent projectiles are almost unaffected by the preceding ones.Within this range,dislocated sequential penetration significantly enhances the penetration depth of subsequent projectiles,with preced-ing projectiles guide the trajectories of the subsequent ones.The influence of preceding projectiles on subsequent ones is nega-tively correlated with the dislocation distance.Under the condition where projcetiles penetrate a 80 MPa concrete target at a ve-locity of 600 m·s-1,the penetration depth of the second 57mm projectile increases by approximately 30%compared to the first,while the third projectile's penetration depth increases by up to 25%compared to the second.For projectiles with diameters of 57,80,and 100 mm,the corresponding L1 values are 2,3,and 3.5 times the projectile diameter,respectively,and the L2 val-ues are 7,10,and 14 times the diameter,respectively.关键词
错位侵彻/侵彻深度/数值仿真/多弹体Key words
dislocated penetration/penetration depth/numerical simulation/multiple project分类
军事科技
