含多重累加函数的典型爆轰驱动模型不确定度分析方法

为了建立适用于含多重累加函数的爆轰驱动模型不确定度分析方法,选择了较为典型的圆筒试验模型进行了分析.针对原始数据获取、位移曲线拟合、膨胀速度及比动能计算等过程,讨论了影响各物理量测量不确定度的主要因素,并对多重累加函数拟合参数的不确定度评定模型进行了修正.同时,基于TNT和JO-159两种典型炸药的φb25 mm圆筒试...

Research on Uncertainty Analysis Method of Typical Detonation Driven Model with Multiple Accumulation Function

In order to establish an uncertain analysis and calculation method for the detonation driven model with multiple accumulation functions, a typical cylinder test model was selected for uncertainty analysis. The main factors that affected the measurement uncertainty of various physical quantities mainly included the processes of obtaining original data, fitting displacement curve, calculating expansion velocity and specific kinetic energy. The uncertainty evaluation model of fitting parameters with multiple accumulation functions was modified. At the same time, based on the results of 25mm cylinder test for TNT and JO-159, the variation rule of measurement uncertainty of specific kinetic energy was obtained, and the influences of several factors were analyzed. The results showed that the most important factor that affected the measurement uncertainty of specific kinetic energy of copper pipe was the relative uncertainty of image magnification ratio. With the increase of the specific kinetic energy of copper pipe, the standard uncertainty increased approximately linearly, while the relative uncertainty gradually decreased in the middle and later stages of expansion. For 25mm cylinder test of most high explosive, the relative expanded uncertainty (k=2) of the specific kinetic energy was no more than 2% and became smaller for explosives with higher work capacity.