论文部分内容阅读
针对雷达目标在军事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。
Aiming at the important strategic position of radar target in military attack, a solution to the temperature field of target surface in shielded radar is proposed. First of all, the structural characteristics of the radar target are analyzed. Based on this, the shielded radar target is simplified as the ellipsoid target. Secondly, the three-dimensional temperature field of the radar target is modeled and the transient heat conduction equation is established in the spherical coordinate system. Finally, the model of the target surface temperature and the boundary conditions are simplified. An iterative method based on the dimensionality reduction finite difference is proposed to solve the temperature field of the target surface. The temperature field distribution and infrared simulation images obtained by the algorithm in this paper are in accordance with the actual situation. The temperature variation law is consistent with the reality. The established temperature field model and the solution method are feasible, which provide the basic parameters for further research on the target infrared radiation characteristics Theoretical basis.