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| Research on Uncertainty Analysis Method of Typical Detonation Driven Model with Multiple Accumulation Function |
| SHEN Fei,WANG Hui,ZHANG Gao |
| Xi'an Modern Chemistry Research Institute, Xi'an, Shaanxi 710065, China) |
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Abstract 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.
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Received: 29 July 2019
Published: 20 August 2021
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2021, Vol. 42 
