中文摘要：

为了评价高速铁路25kV电压等级接触网接触线对车厢内电磁环境影响的安全性，利用COMSOL Multiphysics软件，以CRH5型动车组为蓝本，建立了真实车厢、接触网接触线和不同姿态乘客的电磁模型，仿真分析了由接触线产生的工频磁场对车厢内乘客电磁暴露的情况，并与无车厢时对接触线下方乘客直接电磁暴露的情况进行了对比。仿真研究结果表明：在有铝合金车体提供屏蔽保护时乘客位置的磁感应强度值均远远小于无铝合金车体提供屏蔽保护时的值，这说明铝合金车体能有效地屏蔽工频磁场；在车厢中位于车窗边的乘客头部磁感应强度、感应电场强度的最大值要比位于车厢中部站姿乘客头部相应的值大；乘客头部磁感应强度、感应电场强度的最大值均小于国际非电离防护委员会（ICNIRP）制定的公众电磁暴露基本限值。该仿真研究说明25kV电压等级接触网接触线的电磁暴露对乘客健康的影响是安全的。

英文摘要：

The aim is to evaluate the safety of electromagnetic environment in the carriage of high-speed railway exposed to 25 kV contact line. Based on the CRH5 EMU, the electromagnetic model of the real carriage, the contact line of the catenary and the variety of postures passengers were set up by using COMSOL Multiphysics software. The electromag- netic radiation caused by contact line to the passengers was investigated in the carriage, and compared with the case that passengers were directly exposed under the contact line. The simulation research results show that when the shielding protection is provided by the aluminum alloy train body, the magnetic induction strength is much less that in the absence of shielding protection. It is proved that the aluminum alloy train body can effectively shield the power frequency mag- netic field. Meanwhile, the simulation results show that the maximum value of magnetic induction strength and induction electric field strength of the passenger＇s head at the window position are larger than those of the passenger＇s head in the middle of the carriage. The maximum value of the magnetic induction strength and induction electric field strength in the head of two passengers in the carriage are all far below the recommended values of public electromagnetic exposure by the International Commission on Non-ionizing Radiation Protection（ICNIRP）. The simulation research shows that the electromagnetic exposure of the contact line of contact line at 25 kV voltage level does not affect the health of passengers.