软体防弹衣穿透概率的分析

Study on the Probability of Perforation for Soft Body Armor

穿透概率曲线(POP曲线)的建立为防护材料的评估提供更合理的方法,它能评估低速度的穿透概率,具有非常重要的实际意义。文中以超高分子量聚乙烯防弹衣(PE防弹衣)为研究对象,采用51式7.62 mm手枪弹进行弹击测试,通过逻辑回归和线性回归两种方法建立了POP曲线,获得了PE防弹衣的v50(穿透概率为50%的速度)和v05(穿透概率为5%的速度).两种方法得到的v50均为592 m/s,非常接近;逻辑回归法得到v05为538 m/s,而线性回归法则为514 m/s.结果表明逻辑回归法更适合推算低穿透概率的速度。

Probability of perforation（POP） curve is a constructive method to estimate the ballistic performance.It can be used to estimate the low velocity at smaller penetration probability.POP curves have potential and promising application in body armor design.For this purpose,the performance of UHMWPE unidirectional layers（PE armor） against 7.62 mm type 51 pistol bullet was investigated.POP curves was established by logistic function and binary logistic regression.v50（velocity with 50% penetration probability） and v05（velocity with 5% penetration probability） of PE armor were derived from POP curves.v50 was 592 m/s determined by both methods,while v05 was 538 m/s and 514 m/s,respectively.The results indicate that the regression method is more suitable for the estimation of velocity at low penetration probability.The difference between the two POP curves was discussed.