Analysis on the resistive force in penetration of a rigid projectile

According to the dimensionless formulae of DOP (depth of penetration) of a rigid projectile into different targets, the resistive force which a target exerts on the projectile during the penetration of rigid projectile is theoretically analyzed. In particular, the threshold V_c of impact velocity applicable for the assumption of constant resistive force is formulated through impulse analysis. The various values of V_c corresponding to different pairs of projectile-target are calculated, and the consistency of the relative test data and numerical results is observed.     

多刚体系统计算机代数动力学建模研究

本文研究了复杂多刚体系统的Ｌａｇｒａｎｇｉａｎ建模方法，以Ｍａｔｈｅｍａｔｉｃａ数学软件为基础，完成了多刚体动力学系统的计算机建模、推导与仿真。     

利用加速度FRF的质量控制区段求测刚体质量分布特性

本文详细地介绍了一种如何利用实验模态分析中测得的加速度频率响应函数的质量控制区段来求出被测刚体的质心位置及质量矩阵诸元的方法。     

Attitude deflection of oblique perforation of concrete targets by a rigid projectile

A perforation model is developed to predict the attitude deflection in the oblique perforation of concrete targets by a rigid projectile, in which the inertial moment of the projectile is introduced, together with taking the attitude deflection during the shear plugging sub-stage into account, and the shape of the plug formed on the rear surface of target is also re-investigated. Moreover, a new classification of concrete targets is proposed based on the target thickness, with which the attitude deflections in different kinds of concrete targets are analyzed. It is found that the numerical results by using the new perforation model are in good agreement with the previous experimental data and simulated results. Furthermore, the variations of the attitude deflection with the initial conditions (the initial attitude angle and the initial impact velocity) are investigated.