| 大气层外弹道式目标红外特征的数值分析 |
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| 引用本文： | 张骏,王一程,吕相银,杨华. 大气层外弹道式目标红外特征的数值分析[J]. 红外与激光工程, 2008, 37(5) |
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| 作者姓名： | 张骏 王一程 吕相银 杨华 |
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| 作者单位： | 电子工程学院,安徽省红外与低温等离子体重点实验室,安徽,合肥,230037;电子工程学院,安徽省红外与低温等离子体重点实验室,安徽,合肥,230037;电子工程学院,安徽省红外与低温等离子体重点实验室,安徽,合肥,230037;电子工程学院,安徽省红外与低温等离子体重点实验室,安徽,合肥,230037 |
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| 基金项目： | 安徽省红外与低温等离子体重点实验室开放基金 |
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| 摘 要： | 讨论了有限元非等温性对辐射的影响,并给出了三结点三角形单元的辐射热流公式.在结点温差较小的情况下,平均温度法被证明是合理的.将大气层外弹道式目标视为点目标,使用平均温度法并利用有限元法分析得到的表面温度场计算了目标的红外辐射强度空间分布.在计算过程中考虑了目标空间方位的变化对红外辐射强度的影响,并提出空间辐射矩阵对目标飞行全程的红外辐射计算进行加速.
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| 关 键 词： | 红外辐射强度 有限元 空间辐射矩阵 大气层外弹道式目标 点目标 |
Numerical analysis of infrared characteristics of exoatmospheric ballistic target |
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| ZHANG Jun,WANG Yi-cheng,LV Xiang-yin,YANG Hua. Numerical analysis of infrared characteristics of exoatmospheric ballistic target[J]. Infrared and Laser Engineering, 2008, 37(5) |
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| Authors: | ZHANG Jun WANG Yi-cheng LV Xiang-yin YANG Hua |
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| Abstract: | The effect of nonisothermality of finite element on radiation problem was discussed and a radiant flux formula about a three-node triangular finite element was given.The approximate method of average temperature proved reasonable provided that the temperature differences among the nodes'tempera-tures were small.According to the surface temperature fields obtained by the finite element method (FEM),the spatial distribution of the infrared radiant intensities of an exoatmospheric ballistic target was calculated using the approximate method when the target was treated as a point one.In the calculation,the variance of the target's spatial position was taken into account.In order to speed up the calculation,a soatial radiation matrix was put forward. |
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| Keywords: | Infrared radiant intensity Finite element Spatial radiation matrix Exoatmospheric ballistic target Point target |
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