摘要
根据侵彻混凝土介质时弹体表面的应力表达式,得到弹体在侵彻过程中的阻抗力,并建立弹体的运动方程。临界贯穿情况发生时,贯穿块表面刚好达到剪切破坏应力,利用这一条件并结合贯穿系数的定义,推导出混凝土板受刚性弹撞击的贯穿系数计算公式。通过计算分析表明:混凝土板的贯穿系数随弹体侵彻深度hq值的增大而减小,随弹体直径d的增大而增大,并且将计算结果与国内外经验公式的结果进行对比,验证了文中贯穿系数计算方法的可靠性。
Based on the surface stress expression of projectile penetrating into concrete,penetration resistance was derived,and dynamic equation was constructed.It was assumed that the perforation block is separated from the surround- ing material as soon as the shear failure criterion is reached on the block surface.By using the above assumtion and ac- cording to the definition of perforation coefficient,the formula for perforation coefficient of concrete slab impacted by a rig- id projectile was deduced.Through analysis,it is shown that the higher the penetration depth,the lower the perforation coefficient,and perforation coefficient increases with increasing diameter of projectile.The reaults of the proposed means for perforation coefficients agree well with those by current empirical methods.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第11期101-104,共4页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50578158)
关键词
贯穿系数
贯穿
侵彻
混凝土
弹体
perforation coefficient
perforation
penetration
concrete
projectile
