六面体单元中X射线能量沉积算法及其在圆柱壳体结构中应用研究
发布时间：2019-03-07 16:36
【摘要】：为了对三维条件下的X射线热击波传播问题进行数值模拟,需首先解决能量沉积计算的问题。本文采用计算能通量矢量在面单元上积分的方法,给出了一种六面体单元中X射线能量沉积算法,并计算了有限长圆柱壳体构形在X射线正入射及斜入射条件下的能量沉积分布。结果表明:对于正入射,沉积能量沿方位角近似呈余弦分布,与理论解吻合,在半径方向上,能量沉积由表层向内部快速递减;对于斜入射,在壳体内外侧及柱体端面均会出现能量沉积区域,整个沉积能量分布呈现出明显的边界效应。
[Abstract]:In order to simulate the problem of X-ray thermal shock wave propagation under three-dimensional conditions, the problem of energy deposition calculation should be solved first. In this paper, an algorithm of X-ray energy deposition in hexahedral element is presented by calculating the integration of energy flux vector on a surface unit. The energy deposition distribution of the cylindrical shell with finite length under the conditions of normal incidence and oblique incidence of X-ray is calculated. The results show that the distribution of deposition energy along azimuth angle is approximately cosine for normal incidence, which is consistent with the theoretical solution. In the direction of radius, energy deposition decreases rapidly from the surface layer to the interior. For oblique incident, the energy deposition area will appear on the outer side of the shell and on the end of the cylinder, and the distribution of the deposition energy will show obvious boundary effect.
【作者单位】： 国防科学技术大学理学院;
【分类号】：O434.19
本文编号：2436270
[Abstract]:In order to simulate the problem of X-ray thermal shock wave propagation under three-dimensional conditions, the problem of energy deposition calculation should be solved first. In this paper, an algorithm of X-ray energy deposition in hexahedral element is presented by calculating the integration of energy flux vector on a surface unit. The energy deposition distribution of the cylindrical shell with finite length under the conditions of normal incidence and oblique incidence of X-ray is calculated. The results show that the distribution of deposition energy along azimuth angle is approximately cosine for normal incidence, which is consistent with the theoretical solution. In the direction of radius, energy deposition decreases rapidly from the surface layer to the interior. For oblique incident, the energy deposition area will appear on the outer side of the shell and on the end of the cylinder, and the distribution of the deposition energy will show obvious boundary effect.
【作者单位】： 国防科学技术大学理学院;
【分类号】：O434.19
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