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 10.0 g total) of 35CrMnSi steel FSP projectile was used to impact typical high strength low alloy (HSLA) steel plates in 4 mm and 5 mm 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.