RDX基PBX药柱烤燃过程的数值模拟  

Numerical Simulationof the Cook-off Process of RDX-Based PBX Cylinder

作　　者：蒲翰涛 王星[3,4] 赵寒月 陈科全[1,2] 蒋道建[1,2] 路中华[1,2] PU Han-tao WANG Xing ZHAO Han-yue CHEN Ke-quan JIANG Dao-jian LU Zhong-hua(Institute of Chemical Materials, CAEP, Mianyang 621999, China Robust Munitions Center, CAEP,Mianyang 621999, China Software Center for High Performance Numerical Simulation,Beifing 100080, China Institute of Applied Physics and Computational Mathematics, Belting 100080, China)

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621999 [2]中国工程物理研究院安全弹药研发中心,四川绵阳621999 [3]中物院高性能数值模拟软件中心,北京100080 [4]北京应用物理与计算数学研究所,北京100080

出　　处：《含能材料》2016年第10期985-989,共5页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(11372293);国家自然科学基金(11572359)

摘　　要：为合理评估炸药的热安全性,采用自主编写的有限元软件—"含能材料动态响应数值模拟软件",对黑索今(RDX)基高聚物粘结炸药(PBX)药柱的烤燃过程进行了数值模拟,实现了炸药多步热分解反应的动力学过程。探索了点火区域各组份质量分数随温度的变化规律。结果表明,400 K时,初级热分解反应开始加速,450 K时次级分解反应明显发生,至460 K时,第三步热分解反应开始加速,气体终产物逐渐积累,当气体终产物质量分数为0.006%时,发生点火。此外,随着升温速率增加,炸药点火时间急剧衰减,中心点温度下降。To reasonably evaluate the thermal safety of explosive, the cook-off process for RDX-based polymer bonded explosive （PBX） cylinder was numerically simulated using self-written finite element software—dynamic response simulation package for energetic materials. The kinetic process of multi-step thermal decomposition reaction for explosive was realized. Change rule of the mass fraction of each components with temperature in the ignition area was explored. Results show that the primary thermal decomposition reaction at 400 K begins to accelerate. At 450 K, the secondary decomposition reaction occurs obviously. At 460 K, the third step reaction begins to accelerate, the final gas product gradually accumulates. When the mass fraction of final gas product is 0.006%, the ignition occurs. In addition, with the increase of heating rate, the ignition time of explosive is rapidly decayed and the temperature of the center is decreased.

关 键 词：高聚物粘结炸药(PBX) 烤燃试验 数值模拟 点火时间 

分 类 号：TQ560.1[化学工程—炸药化工]