针对雷达目标在**打击的重要战略地位, 提出了一种有罩雷达目标表面温度场求解方法。首先, 对雷达目标的结构特性进行分析, 在此基础上将有罩雷达目标简化为椭球目标; 其次, 对雷达目标三维温度场进行建模, 在球坐标系下建立瞬态热传导方程, 分析边界条件, 建立热平衡模型; 最后, 对雷达目标表面温度场模型及边界条件进行简化, 提出了基于降维有限差分的迭代法, 对目标表面温度场进行数值求解。利用文中算法得到的温度场分布及生成的红外仿真图像, 符合实际情况, 其温度变化规律与实际一致, 建立的温度场模型及求解方法切实可行, 为进一步研究目标红外辐射特性提供了基本参数和理论依据。

A method of shrouded radar target surface temperature field calculation was proposed in this paper, in allusion to the important strategic position of radar target during military attack. Firstly, the structural characteristic of radar target was analyzed, based on which radar target was simplified into spheroid. Secondly, radar target three-dimensional temperature field model was established, including building heat balance equation in spherical coordinates, analyzing boundary conditions, establishing thermal equilibrium model. Finally, through simplifying the surface temperature field model and the boundary condition of the radar target, target surface temperature field was obtained by solving the temperature field model, and a method based on reduced dimension finite difference iterative was proposed. The experimental results show that the calculated distribution of temperature field and the generated infrared simulation images accorded with actual situation, and temperature variation was consistent with the actual, so the temperature field model established and solution method were feasible, which provided basic parameters and theoretical basis for further study on the target infrared radiation characteristics.