卵形弹丸垂直侵彻钢筋混凝土靶的工程解析模型  

Engineering Analytical Model of Ogive-nose Steel Projectiles Vertically Penetrating Reinforced Concrete Target

作　　者：刘志林[1] 孙巍巍[1] 王晓鸣[1] 李文彬[1] 

机构地区：[1]南京理工大学智能弹药技术国防重点实验室,南京210094

出　　处：《弹道学报》2015年第3期84-90,共7页Journal of Ballistics

基　　金：国家重点基础研究发展计划项目(973);国家自然科学基金项目(51278250)

摘　　要：为了研究钢筋混凝土中钢筋对侵彻弹丸的阻力作用,通过对试验取出的钢筋混凝土试块的宏观和微观分析,在球形空腔膨胀模型的基础上,考虑弹丸直接与钢筋发生碰撞时钢筋对弹丸的阻力,建立了弹丸侵彻钢筋混凝土的工程解析模型。分析弹丸在钢筋交汇节点、钢筋网格中心点、单根钢筋的中点以及其他任意位置点与钢筋接触情况下钢筋对侵彻的影响。研究表明,钢筋混凝土中的钢筋不仅对混凝土的强度有影响,在弹丸撞击到钢筋时还对弹丸的侵彻能力有减小的作用。在网眼尺寸一定的条件下,随着体积配筋率的增大,钢筋对弹丸的阻力作用越明显,但在相同体积配筋率下,钢筋直径的影响小于钢筋网层间距的影响。To study the resistance of steel in reinforced concrete while the projectile penetrating the target,the macroscopic and microscopic analysis of reinforced concrete block taken from the test was carried out. Based on the spherical cavity expansion model,the resistance of the projectile due to direct impact with reinforced was considered, and the projectile penetrating reinforced concrete engineering analytical model was established. The effect of steel bar on projectile was analyzed when the contact position located at the intersection node,the grid center point,the midpoint of a single reinforced and any other location points. The study shows that the steel bar in reinforced concrete not only affects the resistance of concrete but also deduces the penetration capability of projectile impacting steel bar. Under specific mesh size conditions, the resistance effect of reinforced on projectile becomes more obvious with the increase of rein forcement ratio, and the influence of bar diameter is less than that of the interlayer spacing of the steel mesh when rein- forcement ratio is invariant.

关 键 词：侵彻 钢筋 钢筋混凝土 空腔膨胀 电镜分析 

分 类 号：O385[理学—流体力学]