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卵形杆弹对铝靶的斜侵彻
引用本文:王峰,王肖钧,胡秀章,刘文韬.卵形杆弹对铝靶的斜侵彻[J].爆炸与冲击,2005,25(3):265-270.
作者姓名:王峰  王肖钧  胡秀章  刘文韬
作者单位:1.中国科学技术大学力学和机械工程系,安徽 合肥 230026;
基金项目:国家自然科学基金 , 国家重点实验室基金
摘    要:在Lagrange有限元基础上,扼要介绍了一种适用于三维斜侵彻数值模拟计算的滑移面处理技术。该方法放弃了传统滑移计算中从单元的设置,而代之以预设从节点,从而避免三维斜侵彻数值计算中主从单元的相交、滑移面的识别、修正与再定义的困难。在确保计算精度的同时,有效地提高了计算效率。卵形杆弹对铝靶侵彻的系列数值模拟计算表明,无论对于正撞击或斜撞击,本文中所获结果与实验结果都有良好的一致性,这说明本文中所述方法和所建程序的合理性和有效性,为侵彻贯穿过程的数值分析提供了一种实用和有效的手段。

关 键 词:爆炸力学    侵彻和贯穿    滑移面    卵形杆弹    剩余速度    有限元
文章编号:1001-1455(2005)03-0265-06
修稿时间:2004年8月2日

Oblique penetration of an ogive-nosed rod into the aluminum target
WANG Feng,WANG Xiao-jun,HU Xiu-zhang,LIU Wen-tao.Oblique penetration of an ogive-nosed rod into the aluminum target[J].Explosion and Shock Waves,2005,25(3):265-270.
Authors:WANG Feng  WANG Xiao-jun  HU Xiu-zhang  LIU Wen-tao
Institution:1.Department of Mechanics and Mechanical Engineering, University of Science and Technology of China,  Hefei 230026, Anhui, China;2.Institute of Applied Physics and Computational Mathematics, Beijing 100088,  China
Abstract:Based on the Lagrange finite element method, briefly introduce a computational technique for sliding interface treatment in 3D oblique penetration. The slave elements used in conventional com- putations are abandoned, and at the same time the slave nodes are advanced. Thereby, the difficulties such as the master-slave element intersection, the sliding interface recognition, modification and re- definition encountered in 3D oblique penetration simulation calculations are avoided to insure high computational precision and efficiency. Numerical computations for the ogive-nosed steel rod penetrat- ing into the aluminum target show that the computational results are in good agreement with the ex- perimental results for both normal and oblique penetrations. Therefore, the method discussed and the program developed are reasonable and effective, and they are resultful for the numerical study on pen- etration and perforation.
Keywords:mechanics of explosion  penetration and perforation  sliding interface  ogive-nosed rod  residual velocity  finite element
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