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弹头高速撞击的有限元分析
引用本文:张晓武,王肖钧,李永池,汤瑞峰.弹头高速撞击的有限元分析[J].工程力学,1993(3).
作者姓名:张晓武  王肖钧  李永池  汤瑞峰
作者单位:华东工学院 (张晓武),中国科学技术大学 (王肖钧,李永池),东北工学院(汤瑞峰)
摘    要:弹丸高速撞击是武器设计中的重要研究课题。本文系统地阐述了Lagr-ange有限元方法的守恒方程、本构方程。在空间上采用四节点二维等参元网格离散化,在时间积分上采用显式中心差分法,并引入了抗沙漏节点力来控制弹塑大变形中的沙漏现象,碰撞接触面采用Wilkins滑移面技术。计算结果表明有限元数值分析是高速撞击领域内较有效的工具之一。

关 键 词:数值分析  撞击  有限元

FINITE ELEMENT ANALYSIS OF THE IMPACT MADE BY A PROJECTILE WITH HIGH VELOCITY
Zhang Xiaowu,Wang Xiaojun,Li Yongchi,Tang Ruifeng.FINITE ELEMENT ANALYSIS OF THE IMPACT MADE BY A PROJECTILE WITH HIGH VELOCITY[J].Engineering Mechanics,1993(3).
Authors:Zhang Xiaowu  Wang Xiaojun  Li Yongchi  Tang Ruifeng
Abstract:The problem about a projectile with high velocity impacting on a target is an important subject in weapon-design. In this paper, the conservation laws and the constitutive equations, are formulated for Lagrange finite element method. 4-node two-dimensional isoparametric element are used for the spatial discretization. The explicit central difference method is used for integrating with respect to time. Anti-hourglass node forces are introduced for controlling hourglass modes in the computation of large elastic plastic deformation. Wilkins' sliding surfaces technique is used for impact interface. The results show that the finite element numerical analysis is one of the effective methods in field of the high velocity impact.
Keywords:numerical analysis  high velocity impact  finite element    
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