弹道极限速度试验值异常性检验方法研究

针对基于量纲分析获得弹道极限速度计算模型函数基础上通过若干试验值拟合获得计算模型的方法,研究弹体侵彻靶体试验所获弹道极限速度试验值异常性的检验方法. 根据统计学原理,提出了特定置信水平下标准化残差值在标准正态分布置信区间落入度的弹道极限速度试验值检验方法;同时,进行了3.0,4.5,6.0,7.5,9.0,10.0g共6种质量35CrMnSi钢FSP弹体对4mm和5mm两种厚度典型高强度低合金(HSLA)钢板的侵彻试验,获得了12个弹道极限速度试验值,基于量纲分析及试验数据获得了相应的弹道极限速度计算模型;并以此模型为实例,根据95%置信水平下标准化残差值在(-1.96,1.96)区间落入度进行了弹道极限速度计算模型的检验和修正,研究结果表明所提方法可用于弹道极限速度试验值异常性的检验. 

Research on Validation Method of Ballistic Limit Velocity Experiment Data Abnormality

A validation method of experiment data abnormality was studied for the projectile impacting target plate experiment in this paper. It took a ballistic limit velocity calculation model based the dimensional analysis, and a calculation model fitted from experiment data. According to statistics theory, the validation method of ballistic limit velocity experiment data was proposed to estimate the possibility that confidence interval of standardized residual falls into standard normal distribution at specific confidence level. In addition, 12 ballistic limit velocity experiment data was obtained with the experiments that 6 kinds of mass (3.0, 4.5, 6.0, 7.5, 9.0 and 10.0g total) of 35CrMnSi steel FSP projectile was used to impact typical high strength low alloy (HSLA) steel plates in 4mm and 5mm thickness, and the corresponding ballistic limit velocity calculation model was obtained with dimensional analysis and the experiment data. Based on the results that the standardized residual falls into (-1.96, 1.96) confidence interval at 95% confidence level, the ballistic limit velocity calculation model was validated and revised. The results show that the proposed method can be used to validate the abnormality of the ballistic limit velocity experiment data.