RESULTS OF NUMERICAL SIMULATIONS OF VARIATIONS IN THE SHOCK SENSITIVITY OF TATB-TYPE HIGH EXPLOSIVES IN RESPONSE TO MULTIPLE SHOCK WAVES IN THE LEGAK CODE
N. A. Volodina, V. B. Titova, M. O. Shirshova
VANT. Ser.: Mat. Mod. Fiz. Proc 2019. Вып.2. С. 37-49.
The paper presents the results of modification of the MK detonation kinetics model in the LEGAK code to enable universal accounting for the shock sensitivity of TATB-based HE depending on its state before the front of the initiating shock wave. The changes in the model apply to the formula responsible for the density of hot-spot formation near the shockwave front, and to the algorithm for shock wave front tracking and analysis of the state of matter before the shock-wave front. The realized modification of the MK model was tested using experimental data for TATB-based HE with initial densities of 1,3 г/cm3 ≤ ρ0 ≤ 1,91 г/cm3. The proposed algorithm enables automatic accounting for the state of HE before the shock front and uniform description of experimental data for both sensitizing and desensitizing of HE in response to multiple shock waves. Keywords: detonation kinetics, shock sensitivity, TATB.
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