爆炸与冲击2025，Vol.45Issue(5)：1-18,18.DOI:10.11883/bzycj-2024-0250
锯齿外形对弹体带攻角侵彻横向过载的影响
Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle
摘要
Abstract
In the process of deep penetration of the earth penetration weapon(EPW)attacking the underground target,the non-ideal penetration attitude with an initial attack angle is inevitable,which will introduce transverse overload with a large peak value for the earth penetrator.It could damage some important components of the earth-penetrating projectile and reduce the penetration efficiency of the projectile.Therefore,it is necessary to study the methodology of reducing the transverse overload peak value of the earth-penetrating projectile.However,the previous research on the earth-penetrating projectile seldom considered the influence of transverse overload,making it difficult to effectively reduce the transverse overload.In order to overcome this problem,a numerical simulation method was used to study the special transverse overload shedding effect and its mechanism of a new type of earth-penetrating projectile with a serrated configuration penetrating concrete targets at non-zero attack angles.The influences of the initial attack angle and the coefficient of the center of mass of the projectile were studied,and the motion,contact force,contact moment,and contact area of the projectile were analyzed using a conventional smooth projectile for comparison.The results show that for small initial attack angles of 1°,2° and 3°,the peak value of transverse overload of the serrated projectile is reduced by about 30.6%,5.2%,and 11.3%,respectively,compared to the smooth projectile but the peak value of contact moment,pulse width,and deflection angle are increased.The research reveals the mechanical mechanism to reduce transverse overload:the serrated body of the projectile reduces the contact area between the projectile and the target,and the transverse contact force is mainly concentrated on the upper surface of the right serrated parts of the first two serrated grooves near the head of the projectile;the transverse contact force between the serrated body and the target decreases,while the transverse contact force between the non-serrated parts(mainly the head of the projectile)and the target increases.Therefore,these two parts of the projectile compete and control the reduction effects of the transverse overload of the whole projectile in the process of deep penetration with an initial attack angle.When optimizations of structural design are used to suppress the ballistic deflection of the serrated projectile,the transverse overload shedding efficiency of serrated projectiles can be effectively improved.关键词
横向降载/攻角/锯齿弹/弹道偏转Key words
transverse overload shedding/attack angle/serrated projectile/deflection of trajectory分类
力学引用本文复制引用
王帅,邓志方,何丽灵,陈红永,李继承,颜怡霞,陈刚..锯齿外形对弹体带攻角侵彻横向过载的影响[J].爆炸与冲击,2025,45(5):1-18,18.基金项目
国家自然科学基金青年科学基金(12302495) （12302495）
四川省自然科学基金杰出青年科学基金(2023NSFSC1913) （2023NSFSC1913）
