弹体高速侵彻陶瓷复合厚靶的计算模型研究

摘要

针对平头弹高速撞击陶瓷复合厚靶的问题，以集中质量法为基础并考虑靶体的内摩擦效应对 Fellows 模型加以改进，建立侵彻过程的理论计算模型并利用 Matlab 编程求得不同撞击速度下弹体侵彻复合靶体的侵彻深度，模型得到了试验结果和数值计算结果的验证。参数分析的结果表明，陶瓷厚度的增加可提高复合靶体的抗侵彻能力，但随着初始撞击速度的提高，弹体的侵彻深度增长曲线趋于平缓。%Aiming at a flat-nosed projectile with high velocity impacting a ceramic composite target,the calculation model based on the lumped mass method was improved by considering target's internal friction effects.The theoretical computing model for the projectile's penetrating process was established and the algorithm was developed by using MATLAB to calculate the depth of the projectile's penetrating the ceramic-composile target under different impact velocity. The results were compared with those of tests and those of numerical simulation with AUTODYN,they agreed well each other.Parametric analysis results showed that the anti-penetration ability of the composite target can be improved with increase in thickness of ceramic;the growth curve of the projectile penetration depth becomes flat with increase in initial impact velocity.