基于索网找形的接触网故障诊断技术研究

在实际运营中,导致接触网弹性发生改变的因素较多,如接触线张力、跨距、承力索张力、吊弦布置变化、吊弦密度以及结构高度等。在不同的因素作用下,接触网弹性变化的速度不同,本文将这种弹性变化的速度定义为弹性变化灵敏度,通过仿真计算定量给出各种因素对弹性变化作用的大小;通过对沪宁城际某区段发生的弓网故障进行分析,将计算得出的弹性变化灵敏度值应用于降低接触网跨距内的弹性不均匀度,以改善弓网动态相互作用的性能,减少悬挂零部件松脱、断裂以及弓网故障的发生,为高铁接触网主动维修提供理论依据。

In the actual operation of railways,there are many factors that lead to the change of catenary elasticity,such as contact wire tension,span,messenger wire tension,change of dropper layout,spacing between droppers and system height.Under the action of different factors,the elasticity change speed of OCL is different.Here,the speed for change of this kind of elasticity is defined as the sensitivity of the change of the elasticity,the effect of various factors on the elasticity change is quantitatively given by the simulation calculation.By analyzing of the pantograph-catenary fault in a section of Shanghai Nanjing intercity railway,the calculated sensitivity value of the elasticity change is applied to reduce the elasticity non-uniformity within the span of overhead contact line,so as to improve the performance of interaction between pantograph-catenary,reduce the looseness,fracture or occurrence of the faults of pantographcatenary,provide a theoretical basis for active maintenance of OCL of high speed railways.