基于细观层次建立刚性弹正侵彻混凝土靶板模型,以弹体长径比作为分析变量,其变化范围为2~12,探究弹体长径比对侵彻弹道偏转的影响.结果表明:弹体长径比变化对弹道偏转影响显著,弹道偏转角度随弹体长径比增加而减小,且减幅逐渐减小,长径比小于7时,其对弹体偏转影响显著;长径比大于7时,弹体几乎不发生偏转,此时,靶板可考虑采用均匀连续介质进行建模.%Based on the micro level,this paper is to establish a rigid projectile normal penetrating into concrete target model. The length-diameter ratio in the range of 2 to 12 is taken as an analysis variable to explore the influence of length-diameter ratio on ballistic trajectory deflexion of rigid projectile normal pen-etrating into concrete targets. The results show that the influence of length-diameter ratio on ballistic traj-ectory deflexion of rigid projectile is significant. The trajectory deflexion angle decreases with the increase of length-diameter ratio at a gradually decreasing rate. When the length-diameter ratio is less than 7,its influence on ballistic trajectory deflexion is significant. While the length-diameter ratio is greater than 7, the projectile is hardly deflected. In this case,a homogeneous continuum medium can be used to model concrete target.
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