Numerical Study of Influence of Afterburning Effect on Blast Load in Confined Cabin

doi:10.3969/j.issn.1000-1093.2019.04.015

Abstract

Abstract: An approach to determine the afterburning energy in ANSYS/AUTODYN simulation is presented based on the unified facilities criteria model and a simplified formula according to the conservation law of energy released in the explosion process. A numerical simulation of TNT explosion in confined space was conducted. The calculated and experimental results show that the afterburning effect of TNT detonation products has a significant influence on the confined blast load. The calculated quasi-static pressure and impulse within 50 ms without considering the afterburning effect of detonation products are 55% and 49% lower than the experimental data, respectively. When the afterburning energy is taken into account, the calculated values of explosive pressure and impulse time history show a good agreement with the experimental data. The proposed method would provide accurate input load for predicting the dynamic responses of structures subjected to confined explosion. Key

Key words: explosionload, confinedspace, afterburningeffect, quasi-staticpressure

CLC Number:

O383⁺.1

KONG Xiangshao, XU Jingbo, XU Weizheng, ZHENG Cheng, WU Weiguo. Numerical Study of Influence of Afterburning Effect on Blast Load in Confined Cabin[J]. Acta Armamentarii, 2019, 40(4): 799-806.

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第40卷
第4期2019 年4月兵工学报ACTA
ARMAMENTARIIVol.40No.4Apr.2019

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