摘要
为研究93钨合金弹体超高速撞击钢板形成破片群的特征参数分布规律,基于有限元分析软件AUTODYN的光滑粒子流体动力学方法,加入GRAY物态方程固相-液相模型,数值模拟了不同撞击速度和弹体直径条件下的超高速撞击过程,并利用实验结果验证了数值模拟结果的准确性。通过破片识别广度优先搜索算法,获得了破片群质量、数量、动量、温度等参数的分布特征。研究结果表明:破片数量及质量主要集中于破片群前端,中间部分较少,而尾端有所上升,大质量破片主要集中于破片群前端以及尾端,其横向速度较低;破片群前端具有高质量、高轴向动量以及高横向动量,这部分破片代表了破片群毁伤威力;高温破片主要分布在破片群中间偏前部,而在破片群前后两端均有较多的低温破片,高温破片的合速度在所有破片中处于中等偏上水平,高合速度破片在各温度段都有分布;弹体直径的增加相对撞击速度的提升可以产生数量更多、总质量更高的破片群。弹体直径、撞击速度的改变对破片群前端的相关参数影响显著,因此能够有效提高破片群毁伤威力。
In order to study the distribution of fragments of hypervelocity 93 W projectile impacting on a steel plate target,the AUTODYN software is used to do the smoothed particle hydrodynamics simulation,and the GRAY solid-liquid phase equation of state is added as a user subroutine in the software. The hypervelocity impact process under the conditions of different impact velocities and body diameters was simulated,and the simulated results were verified by the experimental results. The distribution characteristics of mass,quantity,momentum,temperature and other parameters of the fragments were obtained based on the breadth-first search algorithm for fragments recognition. The study results show that the quantity and quality of fragments are mainly concentrated at the front part of fragment group,are less at its middle part,and are increased at its tail part. The big mass fragments are mainly concentrated at the front and tail parts of fragment group,and their lateral velocities are low. The front part of the fragment group has higher quality,and higher axial and lateral momenta,which represents the damage power of fragment group. High temperature fragments mainly distribute in the middle to front part of the fragments group,and there are many low temperature fragments at the front and tail part of the fragment group. The resultant velocity of high temperature fragments is above the medium velocity of all fragments,and the fragments with high resultant velocity are distributed in all temperature sections. A fragment group with more fragments and higher total mass can be produced by increasing the diameter of projectile than increasing the impact velocity. The change of diameter of projectile or impact velocity has a more significant effect on the front part of fragment group,so the damage power of fragment group can be effectively improved.
作者
马坤
李名锐
陈春林
冯娜
赵南
柯明
周刚
MA Kun;LI Mingrui;CHEN Chunlin;FENG Na;ZHAO Nan;KE Ming;ZHOU Gang(Northwest Institute of Nuclear Technology, Xi an 710024, Shaanxi, China;Department of Engineering Physics, Tsinghua University, Beijing 100084, China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2019年第10期2022-2031,共10页
Acta Armamentarii
基金
国家自然科学基金项目(11772269、11402213)
关键词
钨合金弹体
超高速撞击
破片群分布
光滑粒子流体动力学
GRAY物态方程
tungsteh alloy projectile
hypervelocity impact
distribution of fragments
smoothed particle hydrodynamics
GRAY equation of state
