弹体垂直侵彻混凝土靶体的柱形空腔膨胀理论分析  

Cylindrical Cavity Expansion Model for Projectile Normally Penetrating into Concrete Target

作　　者：王延斌[1] 俞茂宏[1] 林俊德[2] 

机构地区：[1]西安交通大学建筑工程与力学学院,西安710049 [2]西北核技术研究所,西安710024

出　　处：《西安交通大学学报》2004年第3期303-307,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(59779028).

摘　　要：采用统一强度理论作为混凝土材料的屈服准则,根据柱形空腔膨胀理论求得了混凝土靶体在弹体垂直侵彻下的空腔膨胀压力和空腔膨胀速度的关系,给出了柱形空腔膨胀条件下卵形弹体侵彻靶体深度的理论计算公式,求出了弹体以400～1100m/s的速度撞击混凝土靶体的侵彻深度,通过和试验结果比较,表明提出的模型具有一定的合理性.进一步研究还表明,统一强度理论参数b、弹体质量和弹头形状对侵彻深度均有影响,b=0时侵彻深度较大,b=1时侵彻深度较小;弹体质量越大或弹头越尖,侵彻深度越大.Based on the unified strength theory (UST) and cylindrical cavity expansion theory, the relationship of cavity expansion pressure and cavity expansion velocity of concrete target with penetration of projectile at high velocity was obtained. The analytical equation of penetration depth was presented and the penetration depth of long rods when impacting concrete target at 400-1100 m/s was calculated. The comparison shows that the calculation result is in good agreement with the test data. Moreover, the coefficient b of the UST, the shape of the projectile nose, and the mass of projectile have influences on the penetration depth. The penetration depth is large when b=0 and is small when b=1, and it becomes greater with the increase of the mass and the sharpness of the projectile nose.

关 键 词：混凝土 统一强度理论 柱形空腔膨胀理论 侵彻 

分 类 号：O348[理学—固体力学] O385[理学—力学]