截卵形弹体正侵彻加强筋结构靶的理论分析

为研究加强筋结构靶的抗弹性能,采用动量守恒定理,分析了截卵形弹体正侵彻加强筋结构靶的过程,给出了加筋靶破坏变形后凿块质量和花瓣等效质量的理论计算,得出了弹体剩余速度与位移、侵彻位置等物理量之间的关系;通过计算侵彻不同位置时弹体运动过程中筋形成花瓣的动量,得出筋产生最大动量的侵彻位置是弹体的截顶圆与筋中心线相切的位置;对理论计算与实验和数值计算进行了比较,结果表明三者是吻合的.

Theoretical Analysis on Normal Penetration of Truncated Oval-Nosed Projectile Into Stiffened Plate

To study the anti-projectile performance of the stiffened plate,the normal penetration process of Truncated Oval-Nosed Projectile(TONP) into stiffened plate was analyzed by adopting the momentum conservation theorem.The mass of the chiselled block and the equivalent mass of petal after the deformation of stiffened plate were theoretically calculated.The relationships among remaining velocity,displacement and penetration location were obtained.The momentum of petal made of stiffener in different perforation location was calculated,the maximum momentum is achieved when the stiffener centerline is tangent to the truncated oval-nosed circle of projectile.Comparison of theory,experiment and numerical simulations show that the agreement is satisfactory.