| Electrified railway is an important form of transportation in China,which plays a vital role in the social development.With the rapid development of people’s living standards and the technological level,the people’s demand for quality of travel in the city is getting higher and higher,and urban rail traffic systems including metro,light rail and magnetic levitation rise in response to the proper time and conditions.Compared with the flexible catenary that is served for most of electrified railway,the rigid catenary system is especially suitable for utilizing in metro due to its less influence of external environment,less maintenance,no disconnection hidden,lower installation clearance and more reliability.The pantograph and catenary system is one of the three important subsystems,and favorable contact environment and good quality of the pantograph-catenary current are the basic guarantee stable operation of the train.Dynamic contact force,influced by structural parameters and external factor frequently,is one of the direct manifestations of catenary system,and is also the main indicators evaluating quality of current.Based on the background,simulating the pantograph and rigid catenary system of the metro and studying the effect of system’s structure parameter and external factors on dynamic contact force are becoming more and more significant,and some technical reference for physical design and fault management of the pantograph and catenary system could be provided at the same time.In this paper,the reseach mainly focus on Guangzhou metro’s pantograph and rigid catenary system,and the coupling dynamical analysis model of pantograph and rigid catenary system was established by using ANSYS and ADAMS,meanwhile,the effect of system’s structure parameter and external factors on dynamic contact force was studied,the following main aspects were discussed in thesis:This thesis takes the TSG18 D pantograph and rigid catenary as study object,a equivalent model of suspension structure was derived based on literature cite,The three dimensions models of the system was designed in SOLIDWORKS,the correctness of the geometric structure of the pantograph was verified through calculating the longitudinal displacement and angular deflection of pantograph head.The modes and natural frequencies of the pantograph and rigid catenary have been calculated by using ANSYS software,and in order to generate flexible bodies,the three dimensions models of the system must be transformed into modal neutral file.Then the modal neutral file of system could be imported into ADAMS,and all the constraints were added on the basis of design drawing.The simulative coupling model of the pantographand catenary system was established with the help of the IMPACT function between the pantograph slide and contact wire.Furthermore,the influence of the contact force was studied under change of the structural parameters,such as the mass and stiffness of pantograph head,span,the suspension structure equivalent stiffness,the speed of the train,uplift force etc,and the necessity of using the rigid-flexible model of pantograph was discused.By comparing simulation results and the real dynamic data from Guangzhou Metro,the simulative coupling model of the pantograph and catenary system was considered as correct.Finally,taking into account overlap structure and particular fault,the effect of particular fault on the dynamic current quality was studied by comparing the results. |
