基于ABAQUS的PBX炸药烤燃试验数值计算  

Numerical Calculation of Cook-off Test for PBX Explosive Based on ABAQUS

作　　者：陈科全[1,2] 黄亨建[1,2] 路中华[1,2] 聂少云[1,2] 向永[1,2] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900 [2]中国工程物理研究院安全弹药研发中心,四川绵阳621900

出　　处：《火炸药学报》2014年第2期31-36,共6页Chinese Journal of Explosives & Propellants

基　　金：中物院化材所青年人才培养基金(QNRC-201312);中物院学科发展基金(2012B0201019)

摘　　要：建立了炸药烤燃过程的三维计算模型,采用Frank-Kamenetskii模型描述炸药自热反应的放热过程,编写了ABAQUS有限元软件的用户子程序HETVAL,模拟计算了不同升温速率、装药尺寸和壳体厚度等条件下PBX炸药的烤燃过程,分析了点火位置的分布规律。计算结果表明,随升温速率的增加和装药长径比的减小,点火位置从PBX炸药内部移向边缘;随着升温速率的增加,炸药的点火时间显著缩短;装药尺寸和壳体厚度对PBX炸药点火时间和点火温度的影响较小。A three-dimentionai calculation model describing the cook-off process of explosive was set up. The exo- thermic process of autothermal reaction for explosive was described by Frank-Kamenetskii model. The user subrou- tine HETVAL of ABAQUS finite element software was written. The cook-off process of PBX under the conditions of different heating rates, different charging sizes and different shell thicknesses was simulated, and the distribution regularity of ignition location was analyzed. The results show that the ignition location is moved from interior of PBX explosive to its outside with increasing the heating rate and decreasing the length/diameter ratio of charge. The ignition time of explosive is significantly shortened with increasing the heating rate. The ignition time and ignition temperature are slightly affected by charging size and shell thickness.

关 键 词：物理化学 炸药 烤燃试验 点火 数值模拟 ABAQUS 自热反应 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]