步枪弹侵彻背部穿硬防护人体靶标钝击效应研究
Study on the blunt impact effects of rifle bullet penetrating the back through human torso targets wear ballistic insert plate
汪萌 1温垚珂 1徐诚 1许倞2
作者信息
- 1. 南京理工大学 机械工程学院,南京 210094
- 2. 中国兵器工业第208 研究所,北京 102202
- 折叠
摘要
针对枪弹侵彻穿防弹衣人体背部产生脊柱脊髓钝性损伤,建立了DBP10 式5.8 mm步枪弹侵彻NIJ Ⅲ级SiC/UHMWPE防弹插板的数值模型,采用JHB本构和基于Abaqus二次开发的VUMAT本构分别模拟SiC陶瓷和UHM-WPE层合板;开展了5.8 mm步枪弹侵彻NIJ Ⅲ级SiC/UHMWPE防弹插板的数值模拟,通过基于高速摄影的弹道实验结果对比验证了数值模型的准确性;基于枪弹侵彻防弹插板的数值模拟结果,开展了5.8 mm步枪弹以910 m/s入靶速度侵彻背部穿硬防护人体躯干靶标的数值模拟,明确了步枪弹击中防弹衣后压力波在肌肉-脊柱内的传导规律,还原了枪弹侵彻过程中人体典型器官(心、肝、肺、胃等)的应力波传递过程.结果表明:人体背部在枪弹钝击作用下会在脊椎椎骨上产生瞬时高应力,可能导致椎骨骨折、椎间盘突出和脊柱不稳定;致伤点T10 椎体后方脊髓最大应力为1.04 MPa,可能导致脊髓改变;对脊髓上应力与加速度线性回归分析表明,压力与加速度呈正相关.
Abstract
In view of the blunt injury of the spine and spinal cord caused by gun bullets penetrating into the human back of body armor,a numerical model of the DBP10 type 5.8 mm rifle bullet penetrating into the NIJ III level SiC/UHMWPE bulletproof insert plate was established,using the JHB constitutive and secondary development based on Abaqus,the VUMAT constitutive model simulates SiC ceramics and UHMWPE laminates respectively;a numerical simulation of a 5.8 mm rifle bullet penetrating into an NIJ Level III SiC/UHMWPE bulletproof insert was carried out,and the accuracy of the numerical model was verified through a comparison of ballistic experimental results based on high-speed photography;Based on the numerical simulation results of a bullet penetrating a bulletproof insert,a numerical simulation of a 5.8 mm rifle bullet penetrating a hard-protected human torso target on the back at a target entry speed of 910 m/s was carried out,and the pressure wave after the rifle bullet hit the body armor was clarified.The conduction law within the muscle-spinal column restores the stress wave transmission process of typical organs of the human body(heart,liver,lungs,stomach)during the penetration of bullets.The results show that the human back will produce instantaneous high stress on the vertebrae of the spine under the blunt impact of a bullet,which may lead to vertebral fractures,intervertebral disc herniation and spinal instability.The maximum stress of the spinal cord behind the T10 vertebral body was 1.04 MPa,which may lead to changes in the spinal cord.The linear regression analysis of stress and acceleration on the spinal cord showed that there was a positive correlation between pressure and acceleration.
关键词
钝性损伤/防弹插板/数值模拟/步枪弹/人体躯干Key words
blunt injuries/ballistic insert plate/numerical simulation/rifle bullet/human torso引用本文复制引用
基金项目
国家自然科学基金(U2241273)
国家自然科学基金(11872215)
军委科技委基础加强计划技术领域基金(2020-JCJQ-JJ-403)
国防科技重点实验室项目(6124606221101)
出版年
2024
NETL
NSTL
万方数据