LEFP对带壳装药冲击起爆过程的数值模拟与试验

利用圆缺型药型罩形成线性爆炸成型侵彻体(LEFP),研究其对带壳装药战斗部的冲击起爆特性。采用端点起爆方式形成LEFP对直径82mm的聚能战斗部进行动态拦截撞击试验。利用高速摄影观察到战斗部结构失效的过程。采用ANSYS/LS-DYNA仿真软件,建立LEFP冲击起爆带壳装药的数值仿真模型。对LEFP的成型过程、不同炸高以及不同起爆方式条件下拦截撞击带壳装药的过程进行仿真分析。结果表明,测得带壳装药均被引爆,中心线起爆的炸药平均压力峰值为端点起爆的1.17倍。LEFP具有作为装甲车辆主动防护系统或其他防空反导技术毁伤元的可行性。

Numerical Simulation and Experimental Study of LEFP on Impact Initiation Process of Charge with Shell

Based on the character of near-half-cylindrical linear forming LEFP(linear explosive formed projectile), the characteristics of impacting initiation of LEFP on charge warhead with shell was studied. The dynamically intercepting impact test of LEFP formed by endpoint initiation way on shaped charge warhead with diameter of 82 mm was performed. The structure failure process of warhead was observed by a high-speed video camera. The numerical simulation model of LEFP shelled charge was established using ANSYS/LS-DYNA simulation software. Simulation analyses to intercept the process of impacting charge with shell under the conitions of forming process of LEFP, different blasting height and different initiation ways was performed. Results show that all the charge with shell measured are initiated. The average peak pressure of explosive by center line initiation is 1.17 times higher than that of explosive by endpoint initiation. LEFP has the possibility as damage element for an active defense system of armored vehicle or other air defense anti missile technology.