摘要
为探索类椭圆截面弹体侵彻有限厚混凝土靶板的弹道特性,开展了类椭圆截面弹体正、斜侵彻不同厚度混凝土靶实验。结合有限元-光滑粒子伽辽金数值模拟方法,研究类椭圆截面弹体不同侵彻阶段纵向加速度和弹道偏转角度的变化趋势,分析着靶速度、靶板厚度、着靶倾角、滚转角和攻角等因素对弹道偏转的影响规律。研究结果表明:类椭圆截面弹体正侵彻有限厚靶板时,弹道会向小端侧偏转,且随着靶板厚度的增加,弹道偏转角随之增大;通过数值模拟分析发现弹道偏转主要发生在隧道阶段和冲塞阶段,开坑阶段造成的偏转仅为最终偏转角度的1.4%;存在一个临界着靶速度,使高于此速度下的正侵彻弹道偏转角随着侵彻速度增加而减小,低于此速度时变化规律相反,临界速度随靶厚增加呈现先上升、再下降至稳定值的非单调变化规律;弹体以同一倾角斜侵彻时,随着攻角的增加(-6°~6°),弹道由向下偏转变为向上偏转,当攻角为2°时,在0°~30°着靶倾角范围内,具有良好的弹道稳定性;在Oxz平面上,弹体姿态的稳定性随滚转角的增大总体上呈先减弱、后增强的趋势,当滚转角小于150°,弹体结束与靶体作用后,弹体呈现负攻角。
To investigate the ballistic characteristics of a quasi-elliptical cross-section projectile penetrating into finite-thick concrete target,the tests are made on the normal and oblique penetrations of quasi-elliptical cross-section projectiles into the concrete targets with different thicknesses.The variation trends of the longitudinal acceleration and trajectory deflection angle of projectile during different penetrating stages are analyzed through the numerical simulation using the finite element method-smooth particle Galerkin(FEMSPG)algorithm.The effects of impact velocity,target plate thickness,oblique angle,rolling angle and angle of attack on the trajectory deflection are discussed.The research results show that the trajectory deflects toward the flatter surface and the deflection mainly occurs in the tunnel stage and the plugging stage when a quasi-elliptical cross-section projectile penetrates into a target plate with finite thickness.As the thicknessof the target plate increases,the trajectory deflection angle increases.The deflection caused at the crateringstage is only 1.4%of the final deflection angle in numerical simulation.There is a critical impact speed,whichmakes the deflection angle of the normal penetration trajectory decrease with the increase of the penetrationspeed above this target impact speed,while below this critical value,an inverse relationship is observed.Furthermore,the critical speed demonstrates non-monotonic dependence on target thickness,exhibiting aninitial increase followed by progressive reduction until stabilization occurs.The trajectory changes fromdownward deflection to upward deflection with the increase in the angle of attack(-6°-6°)when theprojectile penetrates into a target at the same oblique angle.The trajectory has excellent stability within therange of 0°-30°oblique angle at 2°angle of attack.The attitude stability of the projectile generally weakensfirst and then increases with the increase of the rolling angle on Oxz plane.When the rolling angle is less than150°,the projectile shows a negative angle of attack after it ends interacting with the target.
作者
时振清
刘彦
王晓锋
闫俊伯
白帆
司鹏
黄风雷
SHI Zhenqing;LIU Yan;WANG Xiaofeng;YAN Junbo;BAI Fan;SI Peng;HUANG Fenglei(State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology,Beijing 100081,China;Beijing Institute of Technology Chongqing Innovation Center,Chongqing 401120,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314019,Zhejiang,China)
出处
《兵工学报》
2025年第9期184-197,共14页
Acta Armamentarii
基金
中国博士后科学基金面上项目(2024M764116)。
关键词
类椭圆截面弹体
斜侵彻
有限厚混凝土
弹道特性
quasi-elliptical cross-section projectile
oblique penetration
finite-thick concrete targets
ballistics
作者简介
通信作者:刘彦,邮箱:liuyan@bit.edu.cn。
