Simulation Research On Failure Of Catenary

As the major artery of the national economy, the important livelihood construction as well as the popular travel tools, railway transportation system plays an important role in the development of society and economy in our country. As the source of energy supply for electric locomotive, pantograph-catenary system is very important to ensure the train running uninterrupted reliably and safely, while the fault caused by the failure of catenary occurred frequently in the actual operational process, which has had a negative impact on the current-collection for pantograph-catenary system. So In this paper some common failure behavior of catenary has been investigated as follows.Firstly, the statistics analysis of failure forms that appears possibly in the actual service condition of the catenary has been carried out, through the collection and induction of the relevant research date, the common failure modes and failure causes of the catenary in the actual line operation are summarized. And the failure of suspension, support positioning device and the structural parameters of catenary are mainly introduced.Secondly, the finite catenary model consists of messenger wire, contact wire, dropper, support point and registration arm and the equivalent mass model of TSG19 pantograph are established based on ANSYS software. Especially in order to consider the influence of the failure of registration device on pantographa-carenary system, the finite element model of registration arm is established. The effects on pantographa-carenary dynamic behavior caused by the failure of droppers, registration arms, support points and structural parameters of catenary are studied through simulation calculation.Thirdly, the impact on the vibration characteristics of the catenary itself and pantographa-carenary dynamic behavior caused by the failure of rigid catenary’s span-length and suspension stiffiness are discussed. Meanwhile, it is found that the adverse effects of periodic span excitation may bring to the pantograph catenary system can be effectively avoided by using the random span-length.Especially the failure behavior of the the overlap span is studied, which is the weakness of rigid catenary. And the improvement scheme is put forward to alleviate the failure of the overlap span in the rigid suspension catenary.Finally, based on both the rigid catenary and flexible catenary, the failure of current-collection with double pantographs is studied. The dynamic characteristics of different space between the two pantographs were analyzed. Meanwhile througth optimizing the structure parameters of the catenary and pantograph, the problem of the failure of current-collection with double pantographs is alleviated.