A simplified temporary cavity model for spherical fragments penetrating gelatin

被引：0
|
作者：
Tian H. [1 ]
Lu F. [1 ]
Li Z. [1 ]
Wang S. [1 ]
机构：
[1] College of Liberal Arts and Sciences, National University of Defense Technology, Changsha
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 17期
关键词：
Empirical model; Gelatin; Genetic algorithm; Spherical fragment; Temporary cavity;
D O I：
10.13465/j.cnki.jvs.2021.17.006
中图分类号：
学科分类号：
摘要：
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. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：41 / 46
页数：5
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