Research On Dynamic Characteristics Of 160km/h Current Collector

With the rapid development of urban rail transit,the demand for running speed of urban rail trains is also increasing.At present,the maximum operating speed of trains using the three-track current-receiving system in China is 120km/h,and there is no rail transit system using three rails with a running speed of 160km/h in China.In recent years,urban railways have gradually become a hot issue in the development of urban rail transit,with a maximum speed of 160km/h.The three-rail current receiving has the characteristics of stable and reliable power supply and low maintenance cost,and is one of the development directions of the power supply technology for municipal railways.When the train is running,the vibration of the current collector under the disturbance of the contact rail is an important factor affecting the quality of the current collector.As the speed increases,the vibration response intensifies and the flow receiving quality tends to deteriorate.Therefore,it is of great engineering significance to study the dynamic characteristics of the current collector at a speed of 160km/h.This paper mainly conducts the following research:Firstly,the deformation of the 160km/h current receiver is determined through the study of the modal characteristics,and the elastic deformation law of the contact rail during the train operation is studied by static analysis.Secondly,based on the SPSS statistical software,this paper uses the Pearson coefficient and the Spearman coefficient to analyze the correlation between the vertical acceleration of the frame,the lateral acceleration of the frame and the contact force of the collector shoe in the test data,and determine the degree of influence of the vertical vibration of the frame and the lateral vibration of the frame on the flow quality of the current collector.On this basis,a rigid-flexible coupling dynamic model of the current collector that can consider the frame excitation is proposed.Thirdly,Based on the rigid-flexible coupling dynamics theory,the rigid-flexible coupling dynamics model of the 160km/h current collector is established through the ANSYS and ADAMS platforms,and the reliability of the model is verified by comparing the experimental data.Fourth,based on the rigid-flexible coupling dynamic model of the 160km/h current collector,the vibration response of the current collector under the random irregularity of the contact rail when running in a straight line,the shock vibration response when passing through the rail seam of the expansion joint,and the impact vibration response when passing through the elbow at the end of the contact rail are simulated and analyzed respectively.The following three issues are discussed in depth:1)Influence of slipper mass,swing arm stiffness,tension spring stiffness,etc.on the vibration response of the current collector under random irregularity;2)The influence law of the mass of the slipper and the stiffness of the swing arm on the vibration response of the current collector when it passes through the rail slot;3)Influence law of end elbow slope,slipper mass and swing arm stiffness on the shock vibration response of the current collector when it passes through the elbow.Finally,according to the simulation results,suggestions for optimizing the structure parameters of the current collector are put forward.