电缆屏蔽效能评估方法比较研究

摘要

The main evaluation methods and testing methods of the screening effectiveness of shielded cable are summarized, peak screening effectiveness and time -domain testing method are proposed especially for EMP. The computational model of braided shielded cable's surface transfer impedance is analyzed. By contrast with the computational data of Kely model, the curve of the proposed time - domain methods and the traditional frequency - domain methods fit well with that of the computational result one another.%针对核电磁脉冲,提出了具有工程实际应用价值的峰值屏蔽效能评估指标和脉冲时域测量系统；测试了某型镀银编织屏蔽电缆的转移阻抗,利用Kely理论模型与频域试验验证了测试数据的有效性,三者对比分析结论一致,效果良好.