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材料在脉冲X射线辐照下的汽化反冲冲量计算研究

发表时间:2009-03-15  浏览量:1473  下载量:684
全部作者: 佘金虎,汤文辉
作者单位: 国防科学技术大学理学院物理技术研究所
摘 要: 采用数值差分模拟方法对软X射线辐照材料引起的汽化规律进行研究,提出了两种汽化冲量的计算方法。两种不同计算方法得到的汽化冲量基本相等,得到了汽化冲量和厚度随X射线初始能注量的变化规律,结果表明:对于1 keV软X射线,铝的汽化厚度和汽化冲量随着初始能注量的增大而线性增大。计算结果与一些经验公式的计算结果以及实验结果比较吻合。通过对两种方法计算原理和各计算量的分析表明:两种方法都能较好地计算软X射线辐照材料产生的汽化反冲冲量,但∑pg(t)Δt方法得到的汽化冲量结果更准确,更符合实际。
关 键 词: 工程力学;X射线;汽化反冲冲量;热击波;数值模拟
Title: Calculation studies on blow-off impulse of materials irradiated by pulsed X-ray
Author: SHE Jinhu, TANG Wenhui
Organization: Institute of Technical Physics, College of Science, National University of Defense Technology
Abstract: Boiloff rule irradiated by soft X-ray is studied using numerical difference simulation method, two methods for calculating blow-off impulse are brought forward, and the rule of blow-off impulse and thickness as a function of original energy fluence is gained. The results indicate that blow-off impulse and thickness of Al increase linearly as original energy fluence increasing for irradiating by 1keV soft X-ray. The calculation results agree with what are gained by some experience formula and the results of experiment. Through analyzing the principle of two methods and each calculation parameters, it is shown that two methods can all calculate the blow-off impulse irradiated by soft X-ray, but the result gained by ∑pg(t)Δt method is more exact, and in accordance with practice better.
Key words: engineering mechanics; X-ray; blow-off impulse; thermal shock wave; numerical simulation
发表期数: 2009年3月第5期
引用格式: 佘金虎,汤文辉. 材料在脉冲X射线辐照下的汽化反冲冲量计算研究[J]. 中国科技论文在线精品论文,2009,2(5):436-441.
 
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