Study On Some Key Engineerring Technology Of Rigid Catenary About Urban Rail

Urban rail is developped rapidly in China, rigid catenary is widely used in urban rail transit traction power supply system. Rigid catenary anchor point stiffness is big, make rigid catenary rigid and elastic small on the whole, causing many problems appeared in the process of rigid catenary operation, such as contact wire wear serious, is not conducive to rigid catenary operation; transition of rigid catenary and elastic catenary is a weak link of rigid catenary, is one of key factors related to the quality of pantograph/catenary system, transition of rigid catenary and elastic catenary restricts the improvement of the performance of the pantograph/catenary system. So the study of rigid catenary anchor stiffness and transition of rigid catenary and elastic catenary is important.This thesis mainly studies the stiffness of anchor point firm soft transition of rigid catenary about the key engineering technology of rigid catenary. Study on the rigid catenary’s suspension device, beam and the contact line, the basic structure of the pantograph, and the interaction of pantograph/catenary system, uses finite element method to establish the models of the rigid catenary, pantograph, coupling of pantograph/catenary system. Establish the computer simulation model of pantograph/catenary system.Research on the influence of rigid catenary anchor point stiffness to rigid catenary, analysis methods about changing the stiffness of rigid catenary anchor point by using the cantilever structure, elastic insulators, elastic bolts, to improve the elasticity of rigid catenary.ompare the different ways of changing the anchor point stiffness to conclude the optimal method. Use ANSYS to simulate the effect of pantograph-catenary with different anchor point stiffness at 60 km/h and 80 km/h two kinds of speed to get the data of contact force and vertical displacement of the pantograph, analyze the simulative data to verify the coupling effects of pantograph-catenary after change the anchor point stiffness. Determine anchor point stiffness value of improving the elasticity of the rigid catenary.Research the types and structure of rigid catenary and elastic catenary transition used in metro, research the key factors affecting the relationship of the rigid suspension and pantograph-catenary system performance, through reduce anchor point stiffness of the transitional rigid catenary to decrease the elastic creep speed of the rigid catenary and elastic catenary transition. And improve the performance of the rigid catenary and elastic catenary transition. Use ANSYS to simulate the effect of pantograph-catenary when locomotive run from rigid catenary to elastic catenary and from elastic catenary to rigid catenary respectively. Obtain the data of pantograph-catenary contact force and vertical displacement of the pantograph of rigid catenary and elastic catenary transition, anlyze the simulative data to verify the optimized results. Prove that rigid catenary and elastic catenary transition use elastic anchor point, choose a suitable stiffness value of anchor point can improve the performance of rigid catenary and elastic catenary transition, improve the access speed from rigid catenary and elastic catenary.