通过仿真和实验研究了屏蔽多芯线缆在高空电磁脉冲（high-altitude electromagnetic pulse，HEMP）辐照环境下的耦合特性。首先仿真研究了屏蔽多芯线缆在不同条件下的耦合特性，给出了线缆接线方式、线缆参数对耦合特性的影响。然后搭建了水平极化辐射波电磁脉冲模拟器，进行了辐照测试。结果表明，屏蔽层开路会导致芯线耦合到与屏蔽层相同的高电压，而屏蔽层接地会显著降低芯线上的耦合电压。此外，线缆高度、长度的增加都会导致耦合电流水平的增大。测试结果验证了仿真模型的有效性和仿真结果的准确性。

The coupling characteristics of shielded multi-core cables in high-altitude electromagnetic pulse（HEMP） irradiation environments are investigated through simulation and experiments. Firstly, the coupling characteristics of shielded multi-core cables under different conditions are studied via simulation, revealing the effects of cable wiring methods and parameters on coupling characteristics. A horizontally polarized radiating wave electromagnetic pulse simulator is then constructed for irradiation testing. The results show that an open-circuit shielding layer leads to high voltages coupled onto the core wires, matching the shield voltage, while the grounding shielding layer significantly reduces the coupled voltage on the core wires. Additionally, increases in cable height and length result in higher levels of coupled current. The test results verify the validity of the simulation model and the accuracy of simulation results.