弹体斜侵彻多层间隔钢靶的弹道特性

Trajectory Characteristics of Projectile Obliquely Penetrating into Steel Target with Multi-layer Space Structure

为分析弹体斜侵彻多层间隔靶的弹道特性,开展典型卵形弹体不同入射角侵彻多层间隔钢靶试验和数值模拟研究。利用有限元软件LS-DYNA建立弹体斜侵彻多层间隔钢靶数值仿真模型,分析弹体斜侵彻多层间隔钢靶作用过程,得出弹体入射角、弹体速度、靶体厚度及弹体变形对多层钢靶侵彻弹道特性的影响规律并进行了试验验证。结果表明:弹体入射角越大,侵彻弹道偏转越大;初始速度越大,弹体斜侵彻多层间隔钢靶偏转角度越小,且速度对偏转角的影响幅度随速度增大呈减小趋势;随着靶体厚度增加,弹体斜侵彻多层间隔钢靶弹道由整体向下偏转转变为整体向上偏转;靶体厚度对偏转角的影响幅度随靶体厚度增大呈增大趋势;刚性弹体斜侵彻多层间隔钢靶弹道偏转角度比变形弹小。

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.