基于正交设计方法的双锥罩结构优化设计  

Optimal design of biconical liner structure based on orthogonal design method

作　　者：李磊[1] 马宏昊[1] 沈兆武[1] 

机构地区：[1]中国科学技术大学近代力学系,安徽合肥230027

出　　处：《爆炸与冲击》2013年第6期567-573,共7页Explosion and Shock Waves

基　　金：国家自然科学基金重点项目(51134012);国家自然科学基金面上项目(51174183)~~

摘　　要：设计了一种双锥药型罩,借助数值模拟和实验手段研究其成形及侵彻机理,利用正交设计方法研究不同结构的射流成形性能。结果显示:该双锥罩在爆轰波作用下形成高速射流、翻转弹丸和杵体;小锥角2α显著影响射流头部速度;罩厚t'及大锥角2β高度显著性影响弹丸速度;最佳设计参数为:t'=0.14 cm、2α=50°、2β=135°、小锥角与大锥角罩口直径比N=0.4或0.5,其射流速度分别为6 613、6 839 m/s,弹丸速度分别为2 247、2 095 m/s,侵彻钢靶深度分别为8.24、8.31 cm,开口孔径分别为2.12、2.08 cm。最终优化的双锥罩结构合理,既保证了射流速度,又大大提高了弹丸速度,射流和弹丸先后侵彻目标,达到双重毁伤的目的;在低密度装药和小炸高条件下侵彻效果较理想。A kind of double cone liner was designed,its formation and penetration mechanisms were studied by means of numerical simulations and experiments,the jet parameters of the liners with different structures were analyzed to acquire the optimized result through the orthogonal design method,and the penetration capabilities of the optimized liners were explored by numerical simulation and experimental methods.Results display that the liner can form a shaped charge jet,an explosively formed projectile and a slug.The small cone angle 2α can exercise a significant influence on the head velocity of the jet,and the liner thickness t＇ and the large cone angle 2β can obviously affect the projectile velocity.For the optimized parameters of t＇=0.14 cm,2α=50°,2β=135° and N=0.4 or 0.5,the head velocities of the jets can reach 661 3 and 683 9 m/s,respectively; the velocities of the projectiles can reach 224 7 and 209 5 m/s,respectively; the penetration depths can reach 8.24 and 8.31 cm,respectively; and the hole sizes can reach 2.12 and 2.08 cm,respectively.So the designed biconical liner structure is reasonable,by which can ensure the velocity of the shaped charge jet and greatly improve the velocity of the explosively formed projectile.The jet and the projectile can penetrate into the target successively,by which achieves the double damage.And for a low-density charge and a small standoff,the penetration effect is ideal.

关 键 词：流体力学 射流 正交设计 双锥药型罩 翻转弹丸 

分 类 号：O358[理学—流体力学]