地铁刚性架空接触网汇流排中间接头布置原则研究
代洪宇冯超申正超桑国阳
Arrangement Principles of the Busbar Interlocking Joint in Metro Rigid Overhead Catenary System
DAI HongyuFENG ChaoSHEN ZhengchaoSANG Guoyang
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作者信息:广州地铁设计研究院股份有限公司， 510010， 广州
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Affiliation:Guangzhou Metro Design & Research Institute Co., Ltd., 510010, Guangzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20230604
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中图分类号/CLCN:U225.4
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栏目/Col:供电与能源
摘要:
［目的］地铁刚性架空接触网汇流排中间接头长期工作于受电弓与接触网之间复杂的耦合振动系统之中，中间接头的不合理布置，易存在接头处螺栓松脱及塌腰的现象，导致接头处出现硬点，进一步导致接头处出现接触线磨耗偏大和拉弧现象，因此需对中间接头的布置原则进行研究。［方法］将地铁刚性架空接触网等效成无限跨连续梁，采用有限元法对其弯矩进行计算；分析了不同标准跨距下中间接头最优安装位置，结合不同汇流排标准长度，研究了标准锚段内中间接头的最优布置方案；分析了中间接头不同安装位置对汇流排挠度及其结构动力特性的影响。［结果及结论］为使中间接头处于良好受力状态，可通过匹配标准跨距与相应汇流排长度，确保锚段内所有中间接头均安装在汇流排零弯矩点附近；中间接头在一跨内的安装位置对汇流排跨中挠度值存在一定的影响，而对整锚段汇流排结构动力特性的影响可忽略。
Abstracts:
［Objective］ The busbar interlocking joints of metro rigid overhead catenary system operate for extended periods within the complex coupled vibration system formed between the pantograph and the contact wire. Improper arrangement of intermediate joints can easily lead to issues such as bolt loosening and joint deformation at the connection points, resulting in hard spots, which can further cause excessive wear of the contact wire and arcing phenomena at the joints. Therefore, it is necessary to study the arranging principle for interlocking joints.［Method］ The metro rigid overhead catenary system is modeled as an infinite-span continuous beam, and its bending moment is calculated using the finite element method. The optimal installation positions of interlocking joints under different standard span lengths are analyzed. Based on various standard lengths of busbar, the optimal arrangement scheme of interlocking joints within a standard anchoring section is proposed. Additionally, the influence of different installation positions of interlocking joints on the deflection of busbar and the dynamic characteristics of the structure is analyzed.［Result & Conclusion］ To ensure a favorable stress condition at the interlocking joints, it is recommended to match the standard span length with the corresponding busbar length, thereby ensuring that all interlocking joints within the anchoring section are installed near the zero-bending-moment points of busbar. The installation position of interlocking joints within a span has a certain impact on the mid-span deflection of busbar, while its influence on the overall structural dynamic characteristics of the anchoring section is negligible.
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