Science and Technology of Energetic Materials

Vol.62, No.6 (2001)

Research paper

Numerical simulation method for the complex physical system accompanied by the detonation of the high explosive(*in Japanese)
Masahide Katayama and Katsumi Tanaka


This paper investigates the numerical analysis methods to simulate the propagation process of the shock wave and pressure wave in the gas and / or liquid media accompanied by the detonation of the high explosive, moreover to simulate the deformation of the structures caused by their interaction with the media. These two methods are discussed in their propriety and effectiveness over the numerical examples. The methods are as follows:
1) The multiple - material Eulerian method, which is effective not only for the multiple - material but also for the multiple - phase medium (both gaseous and condensed material). This part consists of the descriptions on the unique pressure determination method in the multiple - material Eulerian cell, and the material boundary determination method.
2) The coupling method between the Eulerian and Lagrangian methods, which is effective for the complex physical system containing both fluid and structural materials.

For the methd 1), we carried out a series of two - dimensional axisymmetric analyses to simulate the detonation of the high explosive in the rigid tunnel and the propagation process of the blast wave outside the tunnel. These analyses, modeling the underground magazine, are discused about both their effectiveness and existing problems. For the methods 2). we also performed three - dimension alanalysis to simulate the detonation of the TNT explosive in the steel cylinder(single open - ended)in the atmosphere, and the deformation and fracture processes of the cylinder and the reinforced concrete wall placed near the cylinder. The numerical results are discussed in their physic obver the visualization of the analysis.
The coupled hydrocde AUTODYN® was applied to both the two - dimensional and three dimensional analyses.

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