The temperature difference between the exposed surface of an underground silo and the surrounding soil surface is significant, which means a silo can be easily found by infrared detection. We designed an infrared camouflage cloak consisting of an imitative layer and an insulation layer for the silos. The imitative layer is used to imitate the thermal response of the soil to the surrounding environment. The insulation layer is used to weaken the impact of the internal temperature field of the silo on the lower boundary of the imitative layer. A silo model including surrounding soil and a soil model without silo were established, and the influences of the material and thickness of each layer on the infrared camouflage effect were analyzed. The results show that when using a silicone rubber containing alumina powder with a volume fraction of 3.18% as the imitative material, its thermal inertia is in consistent with that of the soil. Meanwhile, it was found that the thickness of the imitative layer doesn’t need to be greater than its thermal penetration depth to achieve the infrared camouflage, and the absence of the insulation layer will cause hot spots on the silo surface in winter to weaken the camouflage effect. The optimized thicknesses of the imitative layer and the insulation layer are 22 cm and 4 cm respectively. The simulations indicate that with the application of the cloak, the maximum value of the absolute values of the temperature differences between the average temperatures of the silo surface and the surrounding soil surface temperatures drops from 1.59 °C to 0.31 °C in summer and from 1.92 °C to 0.21 °C in winter. This designed cloak can achieve an all-weather and full-time passive infrared camouflage.

地下筒仓的裸露表面与周围土壤表面之间的温差很大，这意味着可以通过红外检测轻松找到筒仓。我们为筒仓设计了一个由伪装层和绝缘层组成的红外伪装斗篷。模仿层用于模仿土壤对周围环境的热响应。绝缘层用于减弱筒仓内部温度场对模拟层下边界的影响。建立了包括周围土壤的筒仓模型和没有筒仓的土壤模型，分析了每一层的材料和厚度对红外伪装效果的影响。结果表明，当使用含有体积分数为3的氧化铝粉的硅橡胶时。作为模拟材料的18％，其热惯性与土壤一致。同时发现，模拟层的厚度不需要大于其热渗透深度即可实现红外伪装，而缺少绝缘层将导致冬季筒仓表面上的热点减弱其强度。迷彩效果。模仿层和绝缘层的最佳厚度分别为22cm和4cm。模拟表明，通过使用隐身斗篷，筒仓表面平均温度与周围土壤表面温度之间的温差绝对值的最大值从夏季的1.59°C降低到0.31°C，而从1.92降低到1.92冬季为°C至0.21°C。