地铁车辆轴箱接地端子异常开裂原因分析
杨晶马晓龙王洪权李永生刘洪涛
Causes Analysis of Abnormal Grounding Terminal Cracking of Metro Vehicle Axle Box
YANG JingMA XiaolongWANG HongquanLI YongshengLIU Hongtao
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作者信息:中车长春轨道客车股份有限公司国家轨道客车工程研究中心，130062， 长春
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Affiliation:National Engineering Research Center of Railway Vehicles， CRRC Changchun Railway Vehicles Co．， Ltd．， 130062， Changchun， China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.02.025
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中图分类号/CLCN:U270.331+.3;U264.7+4
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栏目/Col:应用技术
摘要:
针对某地铁车辆轴箱接地端子异常开裂问题，从其压接质量、电缆装配、理化分析等方面明确了接地端子开裂的影响因素。基于车辆振动传递路径的轴箱加速度，以及电缆支架和接地端子应力测试，对引起轴箱接地端子的开裂根源进行了研究。测试表明，车辆通过普通道床时，轴箱及接地端子承受较大的轮轨激扰作用，此时接地端子的应力水平远大于减振道床上的应力；电缆及接地端子、线夹板、电缆支架组成的系统的固有频率与普通道床上轮轨激扰的主要频率发生耦合，成为导致接地端子发生开裂的主要原因；及时维护保养线路，同时优化支架结构可抑制耦合共振发生。
Abstracts:
According to the grounding terminal abnormal cracking of metro vehicle axle box, the impact factors are studied and clarified from the terminal crimping quality, cable assembly, physical and chemical analysis of the cracking structure. Based on the vehicle vibration transmission path of acceleration, the stress test of cable support and grounding terminal, the root causes of ground terminal cracking are studied. The test result shows that when passing through ordinary track bed, the axle box and terminals of the vehicle are subjected to greater wheelrail excitation, the grounding terminal stress level is much greater than that on the vibration absorbing track bed. Because the inherent frequency of the system consisting of cables and terminals, wire clamp plates, and cable brackets will be coupled with the main frequency of wheel-track excitation on the ordinary track bed, this is considered as the main cause of the terminal cracking. Therefore, timely maintenance of the line,together with the optimization of the bracket structure can suppress the coupling resonance.
引文 / Ref:
杨晶, 马晓龙, 王洪权, 等. 地铁车辆轴箱接地端子异常开裂原因分析. 城市轨道交通研究, 2022, 25(2): 103.
YANG Jing, MA Xiaolong, WANG Hongquan. Causes analysis of abnormal grounding terminal cracking of metro vehicle axle box. Urban Mass Transit, 2022, 25(2): 103.
YANG Jing, MA Xiaolong, WANG Hongquan. Causes analysis of abnormal grounding terminal cracking of metro vehicle axle box. Urban Mass Transit, 2022, 25(2): 103.
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