在切向矢量有限元软件HFSS中，对某直升机在电磁辐射环境下进行了孔缝耦合的仿真。模拟了飞机由于外部加改装所需开孔的大小和数量，并对直升机外加发射源干扰,来反映机内电磁环境对飞机机载电子设备的影响。对孔缝耦合进行仿真，将仿真结果与DO-160F标准进行比对分析。同时，研究了机内辐射能量与频率、相位的关系，以及机身不同位置下的辐射能量。通过数值分析和仿真结果得出规律性结论，为直升机加改装设备开孔提供理论依据。说明孔缝耦合的电磁仿真分析在航电系统电磁防护的工作中具有重要的指导意义。

Aperture coupling was simulated under electromagnetic radiation environment for a helicopter with tangential vector finite element software HFSS.In software HFSS,the size and quantity of the openings needed for external retrofit to the helicopter was simulated,and an emission source interference was used outside the aircraft.Thus it could reflect the impact of electromagnetic radiation to the airborne electronic equipment.Simulation was made to aperture coupling,and the result was compared with the DO-160F standard.The relationship of the radiation energy with frequency and phase,and the radiation energy at different locations,were also studied.Conclusion was obtained through numerical analysis and simulation results,which can be used as a theoretical basis for making openings in helicopter in retrofit.