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建立了一种基于三维场景的空间目标红外辐射特征计算模型.模型对多层介质目标进行几何建模与三维剖分,考虑目标微动时太阳和地球对目标加热的影响,计算了目标外表面的辐射散热及内腔壁面元间的辐射换热,在此基础上完成目标的三维导热计算,利用Gauss-Seidel迭代法求解微元体的温度,进而计算了中长波和长波红外波段目标自身的辐射、对外热源的反射以及总的辐射亮度图像和辐射强度曲线.研究表明,无自旋的目标在圆周方向受太阳加热不均,温差显著;自旋使目标圆周方向温差减小,温度分布趋于均匀.
A 3D model of infrared radiation characteristics of space target was established.Modeling geometric modeling and 3D meshing of multi-layer medium targets, considering the effect of the sun and the earth on target heating when the target was fretted, the target outer surface And the radiation heat transfer between the inner walls of the cavity were calculated. Based on this, the three-dimensional thermal calculation of the target was completed, the temperature of the micro-body was solved by the Gauss-Seidel iteration method, and then the target itself Radiation, the reflection of external heat source and the total radiation brightness image and radiation intensity curve.Research shows that the non-rotating target in the circumferential direction by the sun uneven heating, the temperature difference significantly; spin so that the target circumferential temperature difference decreases, the temperature distribution tends to In uniform.