航空学报2026，Vol.47Issue(1)：182-196,15.DOI:10.7527/S1000-6893.2025.32015
直升机铝合金机身弹伤形态快速预测方法
Rapid prediction method of bullet damage morphology of helicopter aluminum alloy fuselage
摘要
Abstract
For the rapid prediction and repair requirements of helicopter combat damage morphologies,a database for aluminum alloy body structures subjected to conical-cup-shaped armor-piercing bullets was established based on the Johnson-Cook constitutive model and impact finite element models.A double elliptic function model was developed to describe non-symmetric damage characteristics,incorporating key parameters such as bullet caliber,velocity,and incident angle to establish a relationship function for non-symmetric damage halves.A rapid prediction method for combat damage morphologies was proposed and compared against finite element numerical simulations,support vec-tor machine mode optimized by genetic algorithm models(GA-SVR mode),and experimental results.Subsequently,investigate the effects of projectile caliber,impact velocity,and incidence angle on wound ballistics morphology.The results demonstrate good agreement with experimental measurements,achieving maximum errors of 12.04%in width and 7.03%in length.Compared to finite element numerical simulations and the GA-SVR model,the rapid prediction method achieved MAPE(Mean Absolute Percentage Error)values of 2.87%,4.32%,and 0.62%for the left semi-length,right semi-length,and width of the projectile hole,respectively,while the comparative methods yielded 2.92%,2.67%,and 0.64%respectively.The MAE(Mean Absolute Error)for eccentricity was 0.554 and 0.35 re-spectively.The computational accuracy of the rapid prediction method is comparable to both finite element numerical method and the GA-SVR model.However,the computation time was reduced by approximately 88%and 97.7%re-spectively,demonstrating significantly improved computational efficiency.Compared to bullet caliber and velocity,inci-dent angle has a greater impact on combat damage morphologies.The relationship between the incident angle and the left and right halves of perforation diameter is described by a two-term exponential function,while its relationship with offset distance is given by a three-term polynomial equation.关键词
直升机/穿甲弹/铝合金机身/弹伤形态/快速预测方法Key words
helicopter/armor-piercing bullet/aluminum alloy fuselage/bullet damage morphologies/rapid predic-tion method分类
航空航天引用本文复制引用
张振,谭剑锋,赵京龙,陈林海,闫羽泽,林长亮..直升机铝合金机身弹伤形态快速预测方法[J].航空学报,2026,47(1):182-196,15.基金项目
国家自然科学基金(12172165) （12172165）
江苏省自然科学基金(BK20211259) （BK20211259）
江苏省青蓝工程"优秀青年骨干教师"项目 National Natural Science Foundation of China(12172165) （12172165）
Natural Science Foundation of Jiangsu Province(BK20211259) （BK20211259）
Outstanding Young Backbone Teacher Project of Jiangsu Qinglan Project （）
