头部带肋板的异形结构弹体斜贯穿混凝土薄靶实验和数值模拟

Experiment and Numerical Simulation on Oblique Penetrating Concrete Targets by a Special-Shaped Projectile with Ribbed Head

为了探究一种新型头部带肋板的异形结构弹体斜贯穿混凝土靶的能力和弹道稳定性,利用一级轻气炮,开展了250~350 m/s速度范围内,以0°、15°和30°倾角贯穿300 mm厚混凝土靶的实验,并对同质量、同质心位置的尖卵形头部弹体和头部带肋板异形弹进行了不同速度和倾角下贯穿混凝土靶的模拟计算,模拟结果与实验结果吻合较好。实验和数值模拟结果表明:斜侵彻会降低弹体的贯穿能力,同时影响弹体姿态;在实验工况下,靶板贯穿只有开坑区和冲塞区,开坑区会增大弹体姿态角,而冲塞区会减小弹体姿态角;与尖卵形弹相比,虽然该异形弹头部凸台结构增加了弹靶作用面积导致侵彻能力下降,但是头部的肋板结构使得弹体侵入靶体时受到的偏转力矩更小,弹体有更为优异的抗偏转效果和弹道稳定性。

This paper is focused on a special-shaped projectile with ribbed plate head.In order to explore its penetration ability and trajectory stability,the 152 mm diameter light gas gun was used to launch projectiles to penetrate concrete targets of 300 mm thickness at different angles within the speed range of 250–350 m/s.In the meantime,numerical simulations of ogive-nose projectile and ribbed-head projectile perforating concrete targets with different velocities and inclination angles were implemented with LS-DYNA,and the simulation results are in good agreement with the experimental results.The experimental and simulation results show that oblique penetration will reduce the penetration ability and affect the trajectory stability of projectile.Under experimental conditions,the main damage of the target plate includes the open pit area and the shear plug area.The crater area will increase the attitude angle of projectile,while the caving zone will reduce the attitude angle.Compared with the ogive-nose projectile,although the penetration ability of the special-shaped projectile decreases due to the increase of the action area,the rib structure of the specialshaped projectile makes the missile body suffer less deflection moment when the projectile intrudes into the target,which makes the projectile body have an excellent anti-deflection effect and trajectory stability.