基于LS-DYNA的橡皮碰击弹非致命效应仿真研究

Simulation to Non-lethal Efficiency of Rubber Hit Grenade Based on LS-DYNA

为解决橡皮碰击弹对人体的非致命效应不确定的问题,依据防暴动能弹的致伤判据来确定橡皮碰击弹的基本尺寸,从理论和仿真实验的角度分析橡皮碰击弹的安全性及可靠性;采用八节点六面体单元SOLID164来模拟橡皮碰击弹和皮肤模型,橡皮碰击弹和皮肤的材料选用*MAT—PLASTIC—KINEMATIC,利用有限元软件LS-DYNA对人体的打击效果进行仿真;结果表明,橡皮碰击弹打击皮肤后由圆柱状体变为均匀的圆饼状并在相互接触的表面形成最大的应力分布;橡皮碰击弹以80m/s的初速作用于皮肤时,弹体在1ms内形变作用明显而且比动能未超过12.0J/cm2,皮肤表层未发生破裂和穿透现象且作用效果好;由此可知,橡皮碰击弹在对人体打击时安全性高、打击准确、作用效果明显,是一种安全有效的弹种。

Concerning the uncertainty of non--lethal efficiency in using rubber hit grenade, on the basis of the kinetic energy of the riot of iniury criterion to determine the basic sizes of rubber hit grenade, this paper analyzed the safety and reliability from the perspective of the theory and simulation experiments. We used the eight nodes hexahedron element SOLID164 as the models of rubber and skin, and used the ＊ MAT PLASTIC-KINEMATIC as the matters rubber and skin, and simulated the process when person＇ s skin is hit by rubber hit gre nade using the LS DYNA finite element analysis software. The results showed that the rubber after touch attack to play against the skin by the circle column into a uniform circle pie and stress distribution on the surface of contact with each other to form the biggest. Rubber touch attack to play in a velocity of 80 m/s to act on the skin, the projectile deformation within lms effect obviously and kinetic energy does not exceed 12.0 J/cm2. Skin is not broken and not seen penetrating phenomenon and the effect is good. Obvious, rubber touch attack to play in a blow to the human body with high safety, accuracy, obvious effect, is a safe and effective grenade.