| 损伤炸药的冲击起爆数值模拟 |
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| 引用本文： | 梁增友,黄风雷,张振宇.损伤炸药的冲击起爆数值模拟[J].北京理工大学学报,2006,26(12):1047-1051. |
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| 作者姓名： | 梁增友 黄风雷 张振宇 |
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| 作者单位： | 北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;中北大学,机电工程学院,山西,太原,030051;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;国防科技大学,理学院,湖南,长沙,410073 |
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| 摘 要： | 通过对炸药化学反应速率方程的分析,建立了基于KIM弹粘塑性球壳塌缩热点模型原理的三项式整体化学反应速率方程模型. 运用遗传算法确定了反应速率方程相关参数,通过与Forest-Fire反应速率模型数值模拟结果对比验证所建模型的合理性. 将所建反应速率方程模型嵌入有限元程序对PBX炸药起爆过程进行数值模拟,数值模拟结果与试验结果吻合较好,可以描述分析受冲击加载造成孔隙率、颗粒尺寸等变化的损伤炸药的冲击起爆过程.
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| 关 键 词： | 损伤炸药 反应速率方程 冲击起爆 数值模拟 |
| 文章编号： | 1001-0645(2006)12-1047-05 |
| 收稿时间： | 09 1 2006 12:00AM |
| 修稿时间： | 2006年9月1日 |
Numerical Simulation of Damaged Explosive in Shock Detonation |
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| LIANG Zeng-you,HUANG Feng-lei and ZHANG Zhen-yu.Numerical Simulation of Damaged Explosive in Shock Detonation[J].Journal of Beijing Institute of Technology(Natural Science Edition),2006,26(12):1047-1051. |
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| Authors: | LIANG Zeng-you HUANG Feng-lei and ZHANG Zhen-yu |
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| Affiliation: | 1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; 2. Mechanical and Electronic Engineering Institute, North University of China, Taiyuan, Shanxi 030051, China; 3. National University of Defense Technology, Changsha, Hunan 410073, China |
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| Abstract: | A new reaction rate function model is set up based on the KIM pore collapse hot spot reaction model by an analysis on explosive reaction rate function models.Reaction rate function model parameter is acquired by genetic algorithms.Validation of the model is verified by comparing the simulation results with the Forest-Fire model.The numerical simulation is executed to explosive's initiation and detonation process by embedding the new reaction rate function model into finite element analysis program.Numerical simulation results are in good agreement with experimental results of damaged explosives as to their shock initiation and detonation behaviour.The new reaction model can be used to analyse the detonation mechanism of damaged explosives when the porosity and grain size is changed by impact load. |
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| Keywords: | damaged explosive reaction rate function shock initiation numerical simulation |
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