摘要
在弹体侵彻/贯穿钢筋混凝土靶时,钢筋会对弹道产生显著影响。基于素混凝土的自由面效应,结合考虑钢筋的影响进行了改进和优化。通过弹道平面内和弹道平面两侧钢筋对弹体的碰撞作用进行分析,获得钢筋对弹体的阻力模型;采用微分面力法,建立刚性弹体侵彻/贯穿有限厚钢筋混凝土靶的弹道计算模型。结合实验结果验证了模型的准确性,并分析了钢筋对弹道的影响。结果显示:钢筋会削弱靶体的自由面效应,首层钢筋埋深越浅,弹道偏转越小;弹体碰撞钢筋位置的不同会加剧或抑制弹体偏转,且弹道平面内钢筋对弹道起主要影响作用。
The steel reinforcement has a significant effect on the trajectory of projectile when the projectile penetrates/perforates a reinforced concrete target.The free surface effect of plain concrete is improved and optimized considering the influence of the steel reinforcement.The impact of steel reinforcement on the ballistic plane and the two sides of the ballistic plane on the projectile was analyzed,and the resistance model of steel reinforcement to the projectile was obtained.Based on the differential area force law,a trajectory calculation model of rigid projectile penetrating/perforating a finite-thick reinforced concrete target is established.Combined with the experimental results,the accuracy of the proposed model is verified,and the influence of steel reinforcement on the trajectory is analyzed.The results show that the steel reinforcement weakens the free surface effect of target.The shallower the depth of the first layer of steel reinforcement is,the smaller the ballistic deflection is.The deflection of projectile is aggravated or inhibited due to the difference in the position of the projectile impacting the steel reinforcement,and the steel reinforcement in the ballistic plane has a major effect on the trajectory.
作者
武海军
张雪岩
张爽
黄风雷
WU Haijun;ZHANG Xueyan;ZHANG Shuang;HUANG Fenglei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2020年第S02期12-25,共14页
Acta Armamentarii
基金
国家自然科学基金项目(11572048)
国家自然科学基金委员会与中国工程物理研究院联合基金项目(U1730128)。
关键词
钢筋混凝土
有限厚靶
弹道预测
自由面效应
微分面力法
reinforced concrete
finite-thick target
trajectory prediction
free surface effect
differential area force law
