Dynamic Performance Simulation On Pantograph-Catenary System Of High-Speed Railway And Analysis Based On Finite Element Method

When the electric locomotive is running, the pantograph obtains electrical energy from the electric railway catenary. The dynamic characteristic of pantograph-catenary system affects directly the qualities of the current collection and reliability of locomotive movement. When train speeds are to be increased high-speed, the energy transmission is an important factor that limits the maximum speeds achieved. Therefore, the researches on dynamic performance between pantograph and catenary are very necessary.This paper firstly introduces the research status of pantograph-catenary system, and briefly introduces the research situation of the simulation method of stochastic wind field and the effects of stochastic wind field on the pantograph-catenary system. Subsequently, on the basis of the structure of pantograph-catenary system, the liner and nonlinear model of the pantographs, the calculation model and infinite model of the catenary and the coupling model of pantograph-catenary system are established in this thesis. The scope of application of the models is analyzed. Also, taking pantograph-catenary dynamic system of Beijing-Tianjin inter-city express as example, the finite element models whose parameters are the same with the actual parameters are established, In the models, nonlinear flexible messenger wire and the overhead contact wire are modeled by using Euler-Bernoulli flexible beam, the simplified pantograph mainly includes lower frame and pusher, upper frame, collector head and pantograph slide these three parts. And the pantograph is modeled by using nonlinear springs. Furthermore, on the basis of the contact element, the coupled pantograph and catenary are analyzed as a whole system. Finally, the simulation model adopted Davenport power spectral density unchanging along the height and the stochastic wind fields are numerically simulated by means of harmonic wave superimposing method, and further study the dynamic performance of the pantograph and catenary system in the stochastic wind fields.By simulation, comparing with the simulation results provide by Siemens and field measure results, the finite element model and simulation approach proposed in this thesis are correct and credible. The researches in this paper find that the stochastic wind fields have great influence on the wind-induced response and the dynamic performance between pantograph and catenary. The researches in this paper develop an important way for the further study on the coordination of the structure parameters of the pantograph-catenary system in the stochastic wind fields.