地铁轨道参数及周围环境对埋地管道保护电位影响的ANSYS分析  

ANSYS analysis of the influence of subway track parameters and surrounding environment on the buried pipeline protection potential

作　　者：田逸凡 李建三[1] 易宏 刘振斌 TIAN Yifan;LI Jiansan;YI Hong;LIU Zhenbin(School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou,Guangdong 510640,China;Guangzhou Gas Group Company Limited,Guangzhou,Guangdong 510635,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广州燃气集团有限公司,广东广州510635

出　　处：《河北工业科技》2021年第2期77-84,共8页Hebei Journal of Industrial Science and Technology

摘　　要：为了探究地铁杂散电流对埋地管线的影响规律,应用ANSYS有限元分析软件,对多种情况下埋地管道受地铁走行轨的影响进行仿真分析,并选取金属管线外表面的节点电压值生成沿管道长度的电场强度分布图以及管道保护电位分布图,讨论不同轨道参数及周围环境条件下地铁杂散电流对管道的影响规律。研究结果表明随着管道与走行轨交角的增大,管道周围土壤电场强度整体减弱;走行轨与管道交叉角度的大小会影响埋地管道电位最高值出现的位置;土壤介质、轨道与管道间距以及地铁轨道工况电压均会影响管道保护电位的大小;走行轨正极区域对管道保护电位的影响程度远大于其负极区域。所建模型合理可行,研究结果对于日常燃气管道电位监测具有参考价值。In order to explore the influence law of subway stray current on buried pipelines,the finite element analysis software ANSYS was used to simulate the impact of subway running rail on buried pipelines under various circumstances.The node voltage values on the outer surface of the metal pipelines were selected to generate the electric field intensity distribution map along the pipeline length and the pipeline protection potential distribution map.The influence law of subway stray current on pipeline under different track parameters and ambient conditions was discussed.The results show that with the increase of the crossing angle between the pipeline and the running rail,the soil electric field intensity around the pipeline weakens;the crossing angle between the running rail and the pipeline can affect the position of the highest potential value of the buried pipeline;the soil medium,the distance between the track and the pipeline,and the operating voltage of subway track can affect the protective potential of pipeline;the effect of the positive pole on the protection potential of the pipeline is greater than that of the negative pole.The research model is reasonable and feasible,and the research results have certain reference value for daily potential monitoring of gas pipelines.

关 键 词：石油、天然气能 走行轨 埋地管线 电场强度 管道电位 

分 类 号：TE88[石油与天然气工程—油气储运工程]