高速铁路接触网工频电磁场数值模拟与分析  

Numerical Simulation and Analysis of Power Frequency Electromagnetic Field of Catenary in High-speed Railway

作　　者：孙军民 杨浩浩 SUN Jun-min;YANG Hao-hao(College of New Energy,Longdong University,Qingyang 745000,Gansu;Heshui County Vocational Selordary Professional School,Heshui 745400,Gansu)

机构地区：[1]陇东学院新能源学院,甘肃庆阳745000 [2]合水县职业中等专业学校,甘肃合水745400

出　　处：《陇东学院学报》2024年第2期51-57,共7页Journal of Longdong University

基　　金：甘肃省自然科学基金(23JRRM0755);陇东学院青年科技创新基金(XYZK2204)。

摘　　要：为了分析高速铁路接触网周围工频电磁场的分布特征,从骚扰源和骚扰对象出发,利用有限元分析软件COMSOL Multiphysics架构接触线与钢轨的三维几何空间模型,在接触线承载1000A计算电流的条件下求得接触线周围工频磁场分布,得出钢轨表面和线路中心线的磁感应强度大小。仿真结果表明,磁场主要分布在Z、Y两轴方向,在Z轴方向,磁感应强度在接触线附近达到最大值并在周围逐渐减小,在距钢轨表面约300mm的(Z=300mm)平面上减小到最小值,接近钢轨表面磁感应强度逐渐增大;在接触线附近Y轴方向,钢轨外表面(Y=0mm)处出现最大值,两侧呈现衰减变化,外侧减小速率大于内侧,内侧大约在距钢轨外表面300mm处减小到最小值,并逐渐增大直至接触线表面附近,在接触线内部出现最小值。可见高速铁路接触网周围工频电磁暴露不会对公众健康构成威胁。To analyze the distribution characteristics of the power frequency electromagnetic field around the catenary of the high-speed railway,starting from the disturbance source and object,the three-dimensional geometric space model of the contact line and the rail is constructed by using the finite element analysis software COMSOL Multiphysics.Under the condition that the contact line carries 1000A calculated current,the distribution of the power frequency magnetic field around the contact line and the magnetic induction intensity of the rail surface and the centerline of the line are obtained.The results show that the magnetic field is distributed in the Z and Y axes.In the Z axis,the magnetic induction intensity reaches the maximum near the contact line and gradually decreases around the contact line,decreasing to the minimum on the(Z=300 mm)plane about 300mm from the rail surface,and increasing near the rail surface.In Y axis near the contact line,the maximum value appears at the outer surface(Y=0 mm)of the rail,and the attenuation changes on both sides,and the decreasing rate of the outer side is greater than that of the inner side,while the inner side decreases to the minimum at the distance from the outer surface of the rail to the 300mm,and gradually increases until the surface of the contact line,and the minimum value appears inside the contact line.It can be seen that the power frequency electromagnetic exposure around the catenary of high-speed railway will not pose a threat to public health.

关 键 词：高速铁路 接触网 工频电磁场 COMSOL 

分 类 号：R144[医药卫生—公共卫生与预防医学] U225[交通运输工程—道路与铁道工程]