Automatic calibration of Ignition and Growth model for a DNAN based melt-cast explosive

6th Annual International Conference on Material Science and Engineering

Cao, Tongtang^1,2 ; Zhou, Lin^2 ; Zhang, Xiangrong^2

Anhui Dongfeng Mechanical and Electrical Technology Co LTD, Hefei

230000, China^1

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing

100081, China^2

关键词: Automatic calibration;    Growth modeling;    Melt-cast explosives;    Objective functions;    Optimization algorithms;    Pressure curve;    Shock fronts;    Shock initiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012075/pdf
DOI  :  10.1088/1757-899X/397/1/012075

来源: IOP

【 摘 要 】

To make the calibration of Ignition and Growth model more systematic and efficient for a DNAN based melt-cast explosive, a procedure combining nonlinear software package LS-OPT with hydrocode LS-DYNA was proposed in this paper. Shock initiation experiment was conducted to obtain measured pressure curves. The mismatch between calculated and measured pressure curves was defined as objective function, which was then minimized using optimization algorithm. Calibration results show that the calculated and measured pressure curves agree well both for arrive time to each location and the chemical reaction behind shock front.