刚性架空接触网汇流排挠度分析  

Analysis of Busbar Deflection in Rigid Overhead Catenary

作　　者：代洪宇 冯超 申正超 DAI Hongyu;FENG Chao;SHEN Zhengchao(Guangzhou Metro Design&Research Institute Co.,Ltd.,510010,Guangzhou,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广州510010

出　　处：《城市轨道交通研究》2025年第3期14-18,24,共6页Urban Mass Transit

基　　金：湾区城际新型刚性接触的弓网系统研究项目(KY-2022-134)。

摘　　要：[目的]采用刚性架空接触网授流的地铁线路中,出现了腕臂式悬挂方式下汇流排挠度偏大的现象,因此,深入研究汇流排挠度计算方法及汇流排施工架设方案显得尤为重要。[方法]将刚性架空接触网视为连续梁结构,推导了汇流排跨中挠度计算公式,并采用有限元法进行了验证;结合汇流排施工架设方式,分析了运营线路汇流排挠度偏大的原因;为进一步改善刚性架空接触网平顺性,分析了影响汇流排跨中挠度的各个因素,从增大汇流排截面惯性矩的角度出发,给出了截面优化方向。[结果及结论]刚性架空接触网应视为连续梁结构进行跨中挠度计算;刚性架空接触网悬挂结构为腕臂式时,为使汇流排跨中挠度接近理论值,在架设汇流排时应实施多点支撑,使其保持水平且无挠度状态;在增加汇流排截面高度的同时,合理选择横截面结构能够显著减小跨中挠度,从而进一步提升刚性架空接触网的平顺性。[Objective]In metro lines utilizing ROC(rigid overhead catenary)for current collection,excessive deflection of busbars is observed under cantilever-type suspension structural condition.Therefore,it is crucial to study the deflection calculation methods and the construction installation schemes for busbars.[Method]ROC is modeled as a continuous beam structure,and a formula for calculating busbar mid-span deflection is derived and validated using finite element method.The causes of excessive deflection in operational lines are analyzed in relation to the busbar construction installation methods.To further improve ROC smoothness,factors influencing the busbar mid-span deflection are studied.Through increasing busbar cross-section inertia moment,directions for cross-sectional optimization are proposed.[Result&Conclusion]ROC should be treated as a continuous beam structure for mid-span deflection calculation.When using cantilever-type suspension structures in ROC,to ensure that the actual deflection approaches the theoretical value,multi-point supports should be implemented during the busbar installation to maintain a level and deflection-free state.Increasing the busbar cross-section elevation and selecting an appropriate cross-sectional structure can significantly reduce mid-span deflection,thereby further enhancing ROC smoothness.

关 键 词：轨道交通 汇流排挠度 刚性架空接触网 有限元法 

分 类 号：U225[交通运输工程—道路与铁道工程]