弹丸侵彻钢筋混凝土的工程解析模型

An engineering analytical model for projectiles to penetrate into semi-infinite reinforced concrete targets

既考虑了弹丸侵彻过程中受到的动阻力与静阻力,又考虑了弹丸与钢筋发生碰撞时钢筋对弹丸的直接阻力,提出了弹丸侵彻钢筋混凝土的工程解析模型。不同初速下弹丸的侵彻深度、侵彻过程中弹丸的位移、速度和负加速度时间历程的计算结果与测试数据符合很好,弹丸过载在12000g^15000g之间。该解析模型能够较真实的描述弹丸侵彻钢筋混凝土过程中的运动状态,并且该模型能够分析配筋结构、配筋尺寸、网眼尺寸对侵彻深度和侵彻过程的影响。

Dynamic and static resistances as well as resistance of steel bar to projectile when projectile colliding with steel bar are taken into consideration in the proposed engineering analytical model. Penetration depth and displacement, deceleration, velocity histories of projectiles with different impact velocities during penetration are calculated by using the proposed engineering analytical model and these calculated results are in good agreement with the experimental results. The peak rigid-body accelerations are between -12 000 g and -15 000 g （acceleration of gravity）. The proposed model can represent the movement states of a projectile during its penetrating a semi-infinite reinforced concrete target, and it can be used to analyze the effect of configuration, size and mesh size of a steel bar on pene- tration depth and process.