细长弹在混凝土地面中斜侵彻过程的工程近似分析

在柱腔膨胀模型基础上，将细长弹在水平混凝土地面中的斜侵彻过程，化简为刚性弹体沿攻角方向的轴向运动和垂直于攻角方向土层的一维径向运动．对混凝土层引入锁应变本构模型后，可以获得土盘表面作用力的解析表达式，从而求解弹体运动方程．最后，本文以一些典型算例指出斜侵彻过程的主要特征，并进而说明本方法的适用性和合理性．

ENGINEERING ANALYSIS OF THE OBLIQUE PENETRATION OF CONCRETE TARGET BY SLENDER PORJECTILE

Based on the cylindrical cavity expanding model, the oblique penetration of a slender projectile in the concrete target is supposed to be simplified as an axial motion of the rigid projectile along the attack angel and a radial motion of the concrete layer in the plane perpendicular to the attack direction. A constitution relation named as strain locking model for concrete is assumed. An analytical equation for the forces applied on the concrete layer(or soil plate) by the projectile is obtained and so that the motion equation of the porjectile can be solved numerically. Finally, some results of typical cases are used to describe the main features of the oblique penetration, which is useful to show that the method suggested here is available and reasonable in the study of the penetration.