Uncertainty Analysis of Ammunition Ramming Process Based on Probability Density Evolution Method

doi:10.12382/bgxb.2021.0298

Abstract

Abstract: A uncertainty analysis method for ammunition ramming process based on probability density evolution theory is proposed to analyze the influence of uncertain parameters in ammunition ramming process on the consistency of ammunition ramming. The ADAMS dynamic model of ramming process is established. The generalized probability density evolution equation of ramming process solved by finite difference method based on Lax-Wendroff scheme is derived，in which the relationship between state space and probability space is established by the joint probability density function of projectile state variable and random parameters of ammunition ramming process.The simulated displacement curve of ADAMS model is basically consistent with the experimental data，which verifies the accuracy of the proposed model. Compared with the Monte Carlo method，the response probability density function calculated by the proposed method is acceptable.The influence of parameter uncertainty on the projectile response under different working conditions is analyzed，and the mean square error of response is calculated.The results show that the fluctuation range of projectile response expands with the increase in ammunition ramming angle.

Key words: artillery, ammunitionramming, uncertaintyanalysis, probabilitydensityevolution, finitedifferencemethod

CLC Number:

TJ302

WANG Mingming， QIAN Linfang， CHEN Guangsong， LIU Taisu. Uncertainty Analysis of Ammunition Ramming Process Based on Probability Density Evolution Method[J]. Acta Armamentarii, 2022, 43(6): 1215-1224.

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