六面體單元中X射線能量沉積算法及其在圓柱殼體結(jié)構(gòu)中應用研究
發(fā)布時間:2019-03-07 16:36
【摘要】:為了對三維條件下的X射線熱擊波傳播問題進行數(shù)值模擬,需首先解決能量沉積計算的問題。本文采用計算能通量矢量在面單元上積分的方法,給出了一種六面體單元中X射線能量沉積算法,并計算了有限長圓柱殼體構(gòu)形在X射線正入射及斜入射條件下的能量沉積分布。結(jié)果表明:對于正入射,沉積能量沿方位角近似呈余弦分布,與理論解吻合,在半徑方向上,能量沉積由表層向內(nèi)部快速遞減;對于斜入射,在殼體內(nèi)外側(cè)及柱體端面均會出現(xiàn)能量沉積區(qū)域,整個沉積能量分布呈現(xiàn)出明顯的邊界效應。
[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.
【作者單位】: 國防科學技術(shù)大學理學院;
【分類號】:O434.19
本文編號: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.
【作者單位】: 國防科學技術(shù)大學理學院;
【分類號】:O434.19
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