球形破片侵彻明胶的瞬时空腔简化模型  

A simplified temporary cavity model for spherical fragments penetrating gelatin

作　　者：田浩成 卢芳云[1] 李志斌 王硕 TIAN Haocheng;LU Fangyun;LI Zhibin;WANG Shuo(College of Liberal Arts and Sciences,National University of Defense Technology,Changsha 410005,China)

机构地区：[1]国防科技大学文理学院,长沙410005

出　　处：《振动与冲击》2021年第17期41-46,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(11872376)。

摘　　要：对破片侵彻明胶形成的瞬时空腔现象进行了研究,基于LS-DYNA软件建立了球形破片侵彻明胶的二维轴对称模型,结合相关试验结果验证了仿真结果的正确性,进而对不同破片直径和着靶速度侵彻有限厚明胶靶后的速度衰减和瞬时空腔尺寸的规律作了分析和讨论。利用遗传算法对不同工况的仿真数据进行拟合,得到了计算瞬时空腔的简化数学模型,通过与更多仿真结果的比对,验证了模型的有效性。该简化模型可用于快速计算球形破片侵彻生物靶标造成的损伤区域,对提高人员目标毁伤评估和易损性分析的效率有实际意义。Here,the temporary cavity phenomenon formed by fragments penetrating gelatin was studied.Based on the software LS-DYNA,a 2-D axisymmetric model of spherical fragments penetrating gelatin was established.The correctness of the simulation results was verified with the relevant test results.Furthermore,change laws of velocity attenuation and temporary cavity sizes after fragments with different diameters and different impact velocities penetrating gelatin target with a finite thickness were analyzed and discussed.The genetic algorithm was used to fit simulation data under different working conditions,and a simplified mathematical model to calculate temporary cavity was obtained.The effectiveness of the model was verified by comparing with more simulation results.It was shown that the simplified model can be used to quickly calculate the damage area caused by spherical fragments penetrating biological targets;the simplified model is of practical significance to improve the efficiency of damage assessment and vulnerability analysis of human targets.

关 键 词：球形破片 明胶 遗传算法 瞬时空腔 经验模型 

分 类 号：TJ012.4[兵器科学与技术—兵器发射理论与技术]