有限区域内核材料复合装置爆炸仿真模拟研究

Simulation study on the explosion of nuclear material composite structure in the finite region

采用计算机有限元仿真技术,设计了特定质量比例的炸药与核材料复合结构,建立了爆炸计算模型,分析了不同工况下铀壳的平均吸收能量及动态响应过程,并开展了容器安全性分析。计算表明,非接触爆炸不利于铀能量吸收,其吸收能量小于接触爆炸,且随着药壳质量比减小平均吸收能量迅速减少,并证明选定容器在爆炸过程中未发生明显结构变化。有关分析结果,将作为下一步开展有限区域内核材料复合结构装置爆炸模拟试验的技术依据,以指导后续试验工作。

Using finite element simulation technology,the explosives and nuclear materials composite structure were designed,the calculation model of explosion was established,the average energy absorption and dynamic response process of uranium shells under different working conditions were analyzed,and the analysis of vessel safety was also carried out.The simulation result suggests that non-contact explosion was less conducive to uranium energy absorption than contact explosion,and the average absorption energy decreases rapidly with the reduce of medicine shell mass ratio,and the structure of selected container changes little in the explosion process.The analysis results will be regarded as technology basis for composite structure device explosion simulation test in the next step so as to guide the subsequent work.