Movement characteristics of high-velocity fragments in water medium: Numerical simulation using LS-DYNA
-
摘要: 基于大型有限元分析软件ANSYS/LS-DYNA,建立三维长方体高速破片在水介质中运动的有限元动力分析模型,采用ALE方法对破片在水下运动过程进行流固耦合数值模拟,获得了破片的速度衰减曲线。研究了速度衰减规律、破片墩粗变形规律以及冲击波传播过程。得到高速破片的侵彻能力随速度的变化规律:当初速度大于910~1 115m/s时破片头部将产生显著变形,并大大影响其侵彻阻力;当破片速度较小时,水中侵彻距离随破片初速的增大而增大,当破片速度达到某临界值以后,侵彻距离将随初始速度的增大而逐渐减小。Abstract: Based on the large-scale finite element analysis software ANSYS/LS-DYNA, the dynamic analysis model was established for the movement of a three-dimensional rectangular high-velocity fragment in water medium.The multi-material arbitrary Lagrangian Eulerian method was used to simulate the underwater movement process of the high-velocity fragment.And the velocity attenuation curve of the fragment was given.The velocity attenuation, the mushrooming rule and the shock wave propagation process were studied.The penetration performance of the high-velocity fragment was obtained by considering its velocity change.When the initial velocity is 910-1 115m/s, the mushrooming is definite, which will increase the penetration resistance for the fragment sufficiently.When the initial velocity is low, the penetration distance of the underwater fragment will increase with the increasing of its initial velocity.When the initial velocity arrives at some critical value, the penetration distance will decrease as the initial velocity of the fragment increases.
-
-
[1] 沈晓乐, 朱锡, 侯海量, 等.高速破片侵彻防护液舱试验研究[J].中国舰船研究, 2011, 6(3): 12-15. http://d.wanfangdata.com.cn/Periodical/zgjcyj201103003Shen Xiao-le, Zhu Xi, Hou Hai-liang, et al. Experimental study on penetration properties of high velocity fragment into safety liquid cabin[J]. Chinese Journal of Ship Research, 2011, 6(3): 12-15. http://d.wanfangdata.com.cn/Periodical/zgjcyj201103003 [2] 白金泽. LS-DYNA3D理论基础与实例分析[M].北京: 科学出版社, 2005. [3] 吴建萍, 魏志芳, 李柱.基于LS-DYNA的球形破片侵彻明胶的数值模拟[J].机电技术, 2011, 1: 28-30. http://www.cnki.com.cn/Article/CJFDTotal-JDJS201101011.htmWu Jian-ping, Wei Zhi-fang, Li Zhu. Numerical simulation of spherical fragment penetrating into gelatin based on ANSYS/LS-DYNA[J]. Mechanical & Electrical Technology, 2011, 1: 28-30. http://www.cnki.com.cn/Article/CJFDTotal-JDJS201101011.htm [4] Trevino T. Applications of arbitrary lagrangian eulerian(ALE)analysis approach to under water and air explosion problems[R]. AD-A384983, 2000. [5] 王肖钧, 赵新.高速钢球在水中贯穿过程的数值计算[J].爆炸与冲击, 1992, 12(3): 213-218. http://www.cnki.com.cn/Article/CJFDTotal-BZCJ199203003.htmWang Xiao-jun, Zhao Xin. Numerical study of a steel ball penetrating in water with high speed[J]. Explosion and Shock Waves, 1992, 12(3): 213-218. http://www.cnki.com.cn/Article/CJFDTotal-BZCJ199203003.htm [6] Tate A. A theory for the deceleration of long rods after impact[J]. Journal of the Mechanics and Physics of Solids, 1967, 15(6): 387-399. http://www.sciencedirect.com/science/article/pii/0022509667900105 期刊类型引用(11)
1. 邵新军,周一卉,黄兆锋,吕振维,李陈龙,张倜哲,陈凯力. 全接液金属浮盘抗爆特性实验与数值模拟. 油气储运. 2024(02): 200-211 . 百度学术
2. 孙士明,刘广涛,颜开,王志. 入水参数对航行体亚音速入水过程影响的数值研究. 中国造船. 2023(01): 1-12 . 百度学术
3. 牟恭雨,罗宁,申涛,梁汉良,柴亚博,翟成. 聚能射流侵彻页岩储层损伤裂隙形成机制. 爆炸与冲击. 2023(03): 85-101 . 本站查看
4. 程鹍,蒯源,沈鸿烈,田宗军,何赛华,洪捐. 锗铜复合微球的放电加工机理分析及实验研究. 电加工与模具. 2021(06): 19-25+51 . 百度学术
5. 李昕,严平,谭波,秦一平. 超空泡射弹水下侵彻靶板三相耦合数值模拟. 高压物理学报. 2020(01): 115-122 . 百度学术
6. 施红辉,周栋,温俊生,贾会霞. 基于ALE方法的弹性圆柱壳入水时的流固耦合模拟. 弹道学报. 2020(01): 9-14+46 . 百度学术
7. 李彪彪,袁宝慧,王辉,沈飞,张立建. 周向液体层对战斗部破片加速过程的影响. 火炸药学报. 2020(02): 219-224 . 百度学术
8. 王莹,肖巍,姚熊亮,秦业志. 水下爆炸冲击波载荷作用下冰层破碎特性及其影响因素. 爆炸与冲击. 2019(07): 74-81 . 本站查看
9. 陈材,石全,尤志锋,郭驰名,戈洪宇. 带水墙靶板对高速破片侵彻能力影响规律. 爆炸与冲击. 2019(12): 126-134 . 本站查看
10. 申涛,罗宁,向俊庠,高祥涛. 切缝药包爆炸作用机理数值模拟. 爆炸与冲击. 2018(05): 1172-1180 . 本站查看
11. 苏杭,李四超,赵铮. 水下舷外发射装置结构设计与仿真. 兵器装备工程学报. 2017(07): 71-73+106 . 百度学术
其他类型引用(13)
-