V形铝合金靶板双射弹高速冲击损伤特性

High-speed Impact Damage Characteristics of V Aluminum Target

为研究V形铝合金靶板抗双射弹高速冲击损伤特性,基于二级空气炮系统开展射弹高速冲击试验,研究靶板变形及射弹剩余速度等变化规律,并基于经验证的有限元模型,研究两枚射弹角度、间距等对靶板损伤失效的影响。研究结果表明,V形靶板在射弹高速冲击下发生局部剪切冲塞破坏,且后侧壁板的损伤面积较大;射弹角度和射弹间距对靶板损伤失效面积影响较小,但射弹角度和间距越小,靶板的塑性变形区域越大;同时射弹间距对射弹速度变化几乎没有影响,但射弹角度越小,剩余速度越小。

In order to study the characteristics of V-shaped aluminum alloy target plate against high-speed impact damage of double projectiles, the experiment is carried out based on the secondary air gun system.The variation laws of target plate deformation and residual velocity of projectiles are studied.Based on the verified finite element model, the effects of angle and spacing of two projectiles on the damage and failure of target plate are studied.The results show that the V shaped target plate is damaged by local shear plug under the high-speed impact of projectile,and the damage area of the rear side wall plate is larger.The impact of the projectile angle and distance on the damage area of the target plate is smaller.However, the smaller the projectile angle and distance are, the larger the plastic deformation area of the target plate is.At the same time, the projectile distance has little impact on the change of projectile speed, Whereas the residual velocity of projectile decreases with the decrease of angle.