Current-Collection Simulation Analysis On Pantograph-Catenary Dynamic System Of High-speed Railway

The dynamic characteristic of the pantograph-catenary system affects directly the qualities of the current collection and the reliability of the locomotive movement. With the locomotive running speed increased, the dynamical contacting turns more and more complex and lead to a lot of problems about stable current-collection. The study on pantograph-catenary system is mainly focus on dynamic behavior, such as analysis of the contact force, study of parameters and structure, investigation of wear, etc.Based on the nonlinear finite element theory (FEM), the finite element model of the pantograph-catenary dynamic system of High-speed train has been established in this thesis, in which model the highly nonlinear flexible catenary is modeled by flexible beam and the pantograph is modeled by hinge and nonlinear springs. The dynamic current-collecting performance of this pantograph-catenary system of High-speed train has been simulated and analyzed using MARC software, the dynamic contact pressure, lift-up displacement and the off-line ratio are all calculated and analyzed. Analysis is that the performance results of pantograph-catenary caused by changed target parameter with the other parameters unchanged and get some useful conclusions through the analysis of simulation resultsTake pantogranph-catenary dynamic system of Beijing-Tianjin inter-city express as an example, establish finite element model which the model parameters are the same with the actual parameters, using simulation software to simulate the pantogranph-catenary dynamic performance, the simulation includes such three aspects as dynamic contact force of the contact line, dynamic uplift and the off-line ratio of pantogranph-catenary. Then get series of process map for dynamic contact force, uplift which vary with the time. Comparing with the simulation results provided by Siemens and the field measure results show that, the finite element model and simulation approach proposed in this thesis are correct and credible, the results also show that the dynamic current-collecting performance is perfect.