侵彻弹加强筋结构可以提高弹体抗压、抗弯能力,但不能改善弹体内壁应力集中现象。文中利用有限元软件AUTODYN-2D模拟实际速度侵彻混凝土靶的过程,分析了变截面结构,并与圆筒结构、加强筋结构进行比较。结果表明,在深侵彻过程中,与其它结构相比变截面结构不仅减少了弹体轴向压缩量,并改善了弹体横截面应力集中现象,从而能有效保障弹体结构的稳定性,提高内部装药的安全性。

Penetration structure with reinforcing rib can enhance compression and anti-bending capability of projectile, but it cant improve the stress concentration within the wall. The variable cross-section was analyzed and compared with cylindrical structure and reinforcing rib structure. The process of penetration into concrete target with actual speed was simulated by using AUTODYN-2D´a finite element software. The result shows that compared with the other two structures, the volume variation of projectile with variable cross-section is reduced and stress concentration during the process of penetration is improved, and the stability of projectile structure is effectively guaranteed so as to improve the security of internal charge of the projectile.