为分析使用砂弹代替实弹进行立靶密集度试验的可行性,分别在弹丸改装前后进行了特征量测量,应用K-S检验法确定了弹丸改装前后的特征量均服从正态分布。在此基础上,利用独立样本T检验方法分析得到弹丸改装前后存在显著差异的特征量是极转动惯量。并以千米立靶密集度试验为例,通过4D弹道模型仿真计算和实际射击试验验证,证明砂弹的特征量分布特性不会对千米立靶密集度造成显著影响,可以使用砂弹进行立靶密集度试验。

In order to analyze feasibility of applying sand projectile in vertical target test, spin-stabilized projectile's characteristic quantity was measured before and after refit, and they were all distributed normally by K-S test. On this basis, it is obtained that significant difference of projectile's characteristic quantity before and after refit is polar moment of inertia by using independent T-test. For example of kilometer vertical target test, it is proved that distribution characteristic of sand projectile's characteristic quantity refit based on present technology has no significant effect on vertical target test result by using 4D trajectory model of spin-stabilized projectiles to do simulation calculation and analyzing the practical vertical target test data, so sand projectile can be used in vertical target test.