摘要
采用ANSYS／LS．DYNA有限元软件对弹体侵彻混凝土靶板的过程进行了数值模拟，讨论了具有不同几何特点弹体的冲击过载模型，研究了卵圆形、椭圆形和半球形弹体侵彻混凝土靶板的冲击过载特性以及不同速度和攻角对弹体引信过载的影响。模拟结果表明：1）在相同侵彻速度下，半球形弹体引信过载大于椭圆形弹体引信过载，椭圆形弹体引信过载大于卵圆形弹体引信过载；2）在同一弹体下，侵彻速率越大，引信过载越大：3）侵彻靶板的过程中层与层之间的引信加速度包络清晰，没有相互粘连现象，即弹体穿透各层靶板的引信过载曲线特征与弹体穿透单层靶板的过载曲线特征相同；4）弹体攻角对引信过载特性也有重要影响，攻角在O。～10。范围内时三种弹体的引信过载都随着攻角的增大而增大，但增大的速度和幅度有很大差别。
Using ANSYS/LS-DYNA finite element modeling software, projectile penetration process of concrete target was simulated, impact overload models of the projectiles with different geometrical features were discussed. Impact overload characteristics of concrete plate target by ovoid, elliptic and hemispherical projectiles as well as effects on fuse overloads of the projectiles under different velocities and attack angles were studied. The simulation results show that： 1） Under the same penetration velocity, fuze overload of hemispherical projectile is greater than that of elliptic projectile, fuze overload of elliptic projectile is greater than that of ovoid projectile. 2） Under the same projectile, the higher penetration velocity, the greater fuze overload. 3） In the penetration process of target plate, fuze acceleration envelopes between layer and layer are clear and have no mutual adhesion. That is to say curve characteristic of fuze overload when the projectile breakthrough each layer is the same as that when the projectile breakthrough monolayer. 4） Attack angle of projectile also has great effect on fuze overload characteristics. When attack angle is in the range of 0~to 10~, fuze overloads of three kinds of projectiles are increased with the increase of attack angle, but there is a larger difference for increase speed and amplitude.
出处
《强度与环境》
2016年第3期23-31,共9页
Structure & Environment Engineering
基金
国家自然科学基金(51475369)
航空科学基金(2013ZF53068)
关键词
侵彻
过载
仿真
引信
penetration
overload
simulation
fuze
