攻角对弹体侵彻复合靶体影响的数值仿真  

Numerical Simulation of Angle of Attack on Body Projectile Penetrating Composite Target Effects

作　　者：李勇[1] 于海龙[1] 芮筱亭[1] 

机构地区：[1]南京理工大学发射动力学研究所,江苏南京210094

出　　处：《计算机仿真》2014年第4期1-4,13,共5页Computer Simulation

摘　　要：研究弹体侵彻问题,对优化武器攻击力和战斗部的设计都有重要意义。针对攻角对弹体侵彻复合靶体效能的影响,通过有限元软件ANSYS/LS-DYNA建立了弹靶几何模型,并利用本软件算法对不同攻角的情况下进行仿真。仿真结果表明,在侵彻过程中弹体会发生偏转,当存在正攻角时,偏移量增加,偏转角度变小;当攻角为负时,弹道向相反方向偏移,偏转角度增大。弹体速度曲线分三个阶段,在侵彻混凝土阶段速度斜率最大,加速度最大,在侵彻碎石结束时,弹体速度有个回升现象。结果表明,攻角对弹体的偏转、速度以及加速度具有重要的影响,为武器攻击力优化设计提供了依据。Projectile penetration has always been a hot topic in the field of military industry,it has an important significance for optimization of weapon damage and design of the warhead. Aiming at effectiveness of angle of attack for projectile penetration composite target body, a geometric model of projectile and target was built with ANSYS/LS DYNA finite element software and simulated using the software algorithm under different angles of attacks. The sim ulation resuhs show that the projectile deflection can happen in the process of penetration, the offset increases and deflection angle is smaller when there is a positive angle of attack. The trajectory shifts in the opposite direction and deflection angle increases when the angle of attack is negative. There are three phases of projectile velocity curve in the process of penetration. The velocity gradient is the biggest in concrete penetration stage, and the projectile veloci ty has a rebound phenomenon at the end of the penetration of gravel. The results show that angle of attack has an im portant influence on deflection, velocity and acceleration of projectile.

关 键 词：侵彻 攻角 偏转 仿真 偏移 

分 类 号：TJ01[兵器科学与技术—兵器发射理论与技术]