摘要
针对破片撞击液舱外板，建立分析模型探讨背水靶板的穿甲过程。以能量分析为基础，根据破片穿甲的运动方程和德·玛尔模型，推导破片穿透背水靶板后的剩余速度公式。根据给出的剩余速度公式，计算不同初始速度（1．0～1．6km／s）的破片穿透背水靶板后的剩余速度，根据已有剩余速度公式计算破片以同样的初始速度穿透背空靶板后的剩余速度，并用非线性动力学分析软件AUTODYN对相应的破片穿甲过程进行数值模拟。模拟结果能较好地与理论计算结果相吻合。与破片穿透空背靶板的情况相比，破片穿透背水靶板后剩余速度降低更明显。破片初始速度越高，板后的液体对破片阻碍作用越明显，破片速度降越大。
Aimed at fragment penetration into fluid cabin bulkhead, a theoretical analysis model was established to explore the penetration process of water-backed targets. Based on the energy analysis, a formula for the residual velocity of the fragment after the water-backed target penetration was derived by combining the motion equation and the De Marre model. The derived formula was applied to calculate the residual velocities of the fragments with the initial velocities of 1.0- 1.6 km/s. And the penetration process of the fragments into the water-backed target was modeled by using the non-linear dynamics analysis software, AUTODYN. The residual velocities by the derived formula are in agreement with those by the software, AUTODYN. The residual velocities obtained above were compared with those by the existent formula for the fragments with the same initial velocities after the air- backed target penetration. Comparison shows that the fluid behind the bulkhead can prevent fragment penetration to a certain extent, and that the residual velocity in the case of the air-backed target penetration is markedly lower than that in the case of the water-backed target penetration. The higher the initial velocity of the fragment, the greater the fluid resistance, the clearer the velocity attenuation.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2010年第4期395-400,共6页
Explosion and Shock Waves
基金
国防基础研究项目(A1420080184)
关键词
固体力学
穿甲过程
剩余速度
防护液舱
破片
solid mechanics
penetrate the target
residual velocity
guarding fluid cabin
fragments
