河北工业科技2025，Vol.42Issue(2)：172-181,10.DOI:10.7535/hbgykj.2025yx02009
高空核爆电磁脉冲辐照下货运高铁内部电场环境分析
Analysis of the internal electric field environment of freight high-speed rail irradiated by high-altitude electromagnetic pulse
摘要
Abstract
To improve the safety of electromagnetic sensitive equipment in the carriage in the complex electromagnetic environment,a high-altitude electromagnetic pulse(HEMP)was used as the excitation source,and the electric field-circuit coupling method was used to analyze the electric field strength and induced current of the PCB inside the power supply chassis containing a DC/DC convert in the freight high-speed rail carriage.Firstly,the simulation model of the electric field environment of the freight high-speed rail was established in the electromagnetic simulation software;Secondly,the chassis was placed at different positions inside the carriages,and the HEMP was used to irradiate the carriages from both the upper and side directions.The finite integration method(FIT)was used to predict the electric field distribution inside the carriages under the irradiation of the HEMP and to calculate the strength of the induced electric field inside the computer chassis;Then,the shielding effectiveness of the aluminum alloy material of the chassis in the range of 30～300 MHz was analyzed using the flange coaxial device method.Finally,the electric field strength of the PCB circuit board inside the chassis and the induced current were obtained using the field-circuit coupling method.The results show that for HEMP with a peak electric field of 50 kV/m,the electric field intensity near the window in the middle of the compartment is higher when irradiated on the side of the compartment at a horizontal distance of 30 km from the nuclear explosion point;3A21 aluminum alloy sample chassis can effectively inhibit the electric field interference;The peak induced current on the PCB circuit board inside the chassis is 1.9 mA,which is in line with the requirements of GB 17625.1-2022 standard;When the peak value of electric field intensity on the PCB circuit board inside the chassis is 270 V/m,the PCB circuit works normally without deviating from the specified index value,meeting the requirements of RS103 electric field radiation sensitivity of GJB 151B—2013 standard.The research results can provide a basis for the electromagnetic protection of high-speed rail freight transportation under HEMP irradiation conditions.关键词
电磁学/货运高铁/高空核爆电磁脉冲/电场环境/屏蔽作用Key words
electromagnetics/freight high-speed rail/high-altitude electromagnetic pulse/electric field environment/shielding effect分类
电子信息工程引用本文复制引用
张岩,展滔,王奕沣,金梦哲,任泽瑄..高空核爆电磁脉冲辐照下货运高铁内部电场环境分析[J].河北工业科技,2025,42(2):172-181,10.基金项目
中国国家铁路集团有限公司科技研究开发计划项目(L2023G011) （L2023G011）
河北省高等学校科学技术研究项目(ZD2021202) （ZD2021202）
河北省大学创新创业训练计划项目(S202410082012) （S202410082012）
