Abstract: The experiment and numerical simulation investigation of typical ogive-nose projectile penetrating into the multi-layer spaced steel targets at different inclination angles were conducted to analyze the trajectory characteristics of projectile obliquely penetrating into the steel target. Simulation models for oblique penetration of projectile into multi-layer steel target were established by LS-DYNA, the action process of the projectile obliquely penetrating into the multi-layer steel targets was analyzed, and the influence rules of projectile inclination angle, projectile velocity, target thickness and projectile deformation on the trajectory characteristics were obtained. The simulated results agree well with the experimental data. The results show that the trajectory deflection increases with the increase in inclination angle, and decreases with the increase in impact velocity, and its influence decreases with the increase in impact velocity. The trajectory deflection changes from overall downward to overall upward， and the influence of target thickness on the trajectory deflection increases with the increase in its thickness. The trajectory deflection of the rigid projectile is smaller than that of the deforming projectile.

Key words: multi-layerspacedsteeltarget, obliquepenetration, penetrationtrajectory, numericalsimulation, trajectorydeflection