有攻角伸出式侵彻体侵彻有限厚靶板数值模拟

The Numerical Simulation of Extended Penetrator with Attack Angle Penetrating into Finite Target

为了能清楚地了解攻角对伸出式侵彻体侵彻靶板能力的影响,采用LS-DYNA3D动力有限元软件对有攻角条件下伸出式侵彻体侵彻靶板进行了数值模拟研究。从靶后动能的角度和同质量同外径的基准杆的侵彻能力做了比较,得出了侵彻体动能随时间的变化规律,分析了攻角和速度对侵彻体侵彻能力的影响。结果表明,在攻角小或速度大时,伸出式侵彻体相对基准杆有较大的穿深增益,而且这种穿深增益随着侵彻速度的增加或攻角的减小而逐渐增加。

In order to understand the influence of attack angle, the expended penetrator penetratinginto finite target with attack angle was simulated with LS-DYNA3D, which was contrasted to that of the baseline rod of the same mass and outer radius. The variation of kinetic energy with time was got for extended penetrator and baseline rod respectively. The study on this problem indicates that the attack angle and velocity influence on the ability of extended penetrator penetrating the finite target. The merit of extended penetrator are high velocity or little attack angle. The merits become more obrious with increase of velocity and the decrease of attack angle.