锥形弹体侵彻过载分析

为研究锥形弹体侵彻过程中的过载特性,在新的侵彻近区速度场基础上,得到了锥形弹体侵彻过程中受到的阻力表达式,以及推广到多层介质中的阻力表达式。利用运动微方程建立了弹体在单层与多层介质中侵彻的过载计算方法,并将计算结果与国内外实验数据进行了对比。锥形弹体侵彻多层介质的过载时程曲线表明,过载的大小及其下降速率与侵彻速度和靶体强度有关。弹体以残余速度侵入下层介质时,若此层介质的强度大于前一层介质时,则会再次出现一个过载峰值。

Deceleration-time of penetration of cone-shaped projectile

To study the deceleration characteristics during penetration of cone-shaped projectiles, the penetration resistance expression of projectiles was carried out during penetration from new velocity expression, which was extended to multilayer media. Based on the expressions, the prediction models of deceleration were carried out during penetration of single concrete target and multilayer media. Decelerations versus time curves were achieved with these models and the comparative analysis was made between this model and experimental data. Decelerations versus time curves in multilayer media show that the size and decrease speed depend on the penetration velocity and the strength of the target. Another peak value will appear if the strength of the current layer medium is more than the previous layer when projectiles penetrate the layer with residual velocity.