| The major study context in this paper includes those:(1) It has discussed basic structure and function mechanism of explosive reactive armor and the dynamite of reactive armor. The disturbance to long tube by reactive armor is studies based on the physical phenomenon of the interactive of reactive armor with tube. The analysis model of the interactive of explosive reactive armor and tube is established. The detonation pressure has no effect on velocity of projectile by theoretical calculation. Analyzation reveals that the changes of projectile's posture and velocity resulted from the confliction of projectile and flying plates.(2) For the problem of the ratio of inner to outer diameter of long tube, according to the "residual core" in the target plays an important role in DOP(depth of penetrateion) of long tube penetrator, the analytical model of long tube pentration in semi-infinite homogeneous steel target is established and calculated to devide three kinds of different scopes, the rule of varied by the ratio of inner to outer diameter is analyzed. The patterns of penetration of the yawed tubular against a normal homogeneous semi-infinite target is established, the size and direction of "residual core" is analyzed, under the different impact yawed, the regularity of variations in the yawed of the tube and depth of the penetrateion is described during the penetrateion against the plate.(3) By means of simplified physical pattern of oblique penetrateion caused by long tube into semi-infinite metal target, a group of equations is established, in the process of the derivation of equations, laws of conservation of momentum in the varing mass system and a hypothesis of the tube mass change are applied, a resistence function acted on the tube, which is taken from the cavity expansion theory, is also employed. The thrust and side moment on the long tube of during penetration are analyed, and gives the variation in velocity, angle, DOP and the profiles of craters during penetrateion. |
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