以Fourier瞬态传热方程为基础, 确定了强流脉冲离子束(HIPIB)热效应的基本传热方程, 对靶材45钢进 行不同能量参数的HIPIB辐照热效应的模拟计算. 针对离子注入金属内部的情况, 在模拟束流加载方式上分别采 用体加载和面加载, 比较了两种加载计算结果之间的差距. 本算法的另一个改进就是在高能量辐照下, 用单 元死活法对蚀坑部分材料的消失进行模拟. 结果表明, 用单元死活法模拟单元的失效, 更能符合HIPIB辐照金属表 面热效应的蚀坑机制; 单元死活法对靶材的升温过程没有明显影响, 但对冷却阶段, 可以显著提高模拟的精度.
Based on Fourier transient state heating conduction equation, this paper confirms the heating conduction equation of HIPIB. The thermal effect of the target 45# Steel surface irradiated by HIPIB with different power density is simulated. In view of the behavior of ion injection into the metal, thermal load of ion current density were simulated with body heat flux mode and surface heat flux mode. The result with two mode were compared. Another amelioration in the simulation is element removed and reactivated method, which can simulate the evaporation of surface metal under injection by high energy ions. The result show that element removed and reactivated method to simulate disabled element was more alike the forming of crater. The element vaporized on the surface were removed so that the elements around it have been no effect their solidification and cooling. Element removed and reactivated method have little effect in the heating process but improved simulated precision in cooling precess sharply
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