Study on the Computational Simulation of Large Scale Gap Test

摘要

This study describes computational simulation Results: in 2-dimensional and 3-dimensional space concerning large scale gap test(LSGT) by using commercial hydrocode such as AUTODYN and LS-DYNA to analyze the detonation phenomenons of high explosives. To consider the possibilities of LSGT simulation, we used Lee - Tarver reaction rate model of PBX-9404 and Comp-B which were implemented AUTODYN's material library. Also we have tried the diverse numerical schemes such as Lagrangian, Eulerian and ALE(Arbitary Lagrangian Eulerian), SPH(Smoothed Particle Hydrodynamics) in LSGT simulations. After LSGT simulations, we compared the simulation Results: with published Results: to verify the LSGT simulations. According to the LSGT simulations, we have concluded as follows. In 2-dimensional and 3-dimensional space, Lagrangian solver provided the most reliable Results: based on analysis time and accuracy. When using two hydrocodes in 2-dimensional space, the simulation Results: are almost same except one explosive model. We have verified the modeling method and simulation Results: of the LSGT by using the commenrcial hydrocode in this study.