装甲车辆与地面背景的热交互作用及红外仿真

为了全面揭示装甲车辆与地面背景之间热交互作用对地面背景温度以及红外辐射特性的影响，建立了装甲车辆和地面背景的温度和红外辐射特性的模型，重点考虑了装甲车辆与地面之间的传热。通过对地面和履带相关力学关系的引入，建立运动车辆和地面之间热学以及力学的模型，采用了动网格方法对车辆目标在运动后对地面所产生的沉陷现象及在地面上留下的热痕迹进行模拟仿真。基于红外辐射理论，综合考虑自身辐射、反射辐射以及大气传输特性，计算了车辆在3种不同状态下与地面背景之间的热交互作用及红外辐射特征分布，并比较了模拟温度与实验测量温度的误差，验证了模型的精度。仿真结果表明:该方法对地面目标的隐身设计和隐身技术评估具有十分重要的意义。

Thermal interactions and infrared simulation of armored vehicles and ground background

In order to fully reveal the influence of thermal interactions between the armored vehicles and ground background on ground background temperature and infrared radiation characteristics, the temperature and infrared signature model of armored vehicles and ground background were established, with focus on heat transfer between armored vehicles and ground. By introducing mechanical relationship between the road and the track, thermal and mechanical models between the moving vehicle and the road were established. Using method of the moving mesh, the subsidence phenomenon and thermal trace on the road after target vehicle moving were simulated. Based on the infrared radiation theory, considering the radiation, reflective radiation and atmospheric transmission characteristic, the thermal interactions and infrared radiation characteristics distribution of armored vehicles and terrain background under three different conditions were calculated. The simulated temperature and measured temperature in the experiment were compared. The model's precision was validated. The simulation results show that this method is crucial to the stealth design and stealth technology assessment of ground target.