LEFP对杆式穿甲弹干扰的数值模拟

摘要

The numerical simulation of the whole process of LEFP intercepting rod penetrator and the rod penetrator penetrating into target plate after intercepted under different intercepting angles,different liner cone angles,different liner wall thickness was carried out by ANSYS/LS-DYNA software.The influence factor of linear explosively formed penetrator (LEFP) intercept rod penetrator was analyzed.The results show that the change in intercepting angles,liner cone angles and wall thickness has a greater impact on the effect of interception.The interference effect of LEFP increases firstly and then decreases with the increase of cone angle and wall thickness.When the cone angle is 120°and the wall thickness is 3 mm,the interference effect to rod penetrator and the protective effect are the best.Amonge them,the intercepted angle has no obvious rule for the interference effect,and when the angle of LEFP and elestic rod is 82°,the depth of penetration is 25 mm,the decrease is the biggest compared with that without interception.%采用ANSYS/LS-DYNA软件对不同拦截角度、不同药型罩锥角和不同药型罩壁厚下线性爆炸成型侵彻体(LEFP)干扰杆式穿甲弹以及被干扰后侵彻靶板的全过程进行了数值模拟,分析了LEFP干扰杆式穿甲弹的影响因素.结果表明,拦截角度、药型罩锥角和壁厚的变化均对干扰效果造成了较大影响,LEFP的干扰效果随着药型罩锥角和壁厚的增加都是先增加再减小,当锥角为120°、药型罩壁厚为3 mm时对杆式穿甲弹的干扰效果最佳,防护效果最好;其中拦截角度对于干扰效果的变化没有明显的规律,LEFP与弹杆夹角为82°时对后效靶板的穿深为25 mm,与无干拢的情况相比降幅最大.