武装直升机具有优异的红外隐身性能和机动能力，能突破末端红外防空系统，在现代对地突袭战中发挥着巨大的作用。以阿帕奇武装直升机为例，基于流体软件建立其红外辐射模型，分析了该直升机在低空时的红外目标辐射特性。针对红外末端防空导弹的主要工作波段，分别计算了其在3～5 m中波红外以及8～12 m长波红外区间的红外辐射强度。最后，以此为基础，分析了武装直升机对末端红外防空的主要威胁，并探讨了几种提高武装直升机探测能力和抗干扰能力的方法。

Because of excellent infrared stealth performance and mobility, armed helicopters can break through terminal air defense systems and play a huge role in modern warfare. Taking an Apache armed helicopter as an example, an infrared radiation model is established on the basis of a fluid dynamics software. The infrared radiation characteristics of the helicopter flying at low altitude are analyzed. For the main operation wavebands of terminal infrared air defense missiles, their infrared radiation intensity values in the middle infrared waveband from 3 to 5 m and in the long infrared waveband from 8 to 12 m are calculated respectively. Finally, on this basis, the main threat of an armed helicopter to terminal infrared air defense is analyzed and several methods for improving the detection and anti-interference ability of armed helicopters are discussed.