Study On The Dynamics Performance Optimization Of Pantograph-catenary Based On Orthogonal Experiment

The dynamic interaction performance between pantograph and catenary is dependent on large number of parameters and the design scheme of pantograph-catenary system.The dynamic matching of pantograph and catenary with different structural parameters is an important aspect of the dynamic performance of pantograph-catenary system.Further study on the dynamic characteristics of pantograph-catenary system is necessary to obtain a good dynamic performance.With research on pantograph of DSA380 and span length of 50 meters stitched catenary suspension system for high-speed railway,three-dimensional finite element simulation model of pantograph and catenary has been built by finite element method based on ANSYS in this paper.Study the influence of the change of pantograph-catenary structure parameters on the dynamic performance of the pantograph-catenary system by using single factor variable method with the pantograph-catenary dynamic finite element simulation technology,and then the effect of pantograph parameters,catenary parameters and pantograph-catenary coupled parameters multi factor and multi level combination of changes on the dynamic performance of the pantograph-catenary are analyzed by using the orthogonal design method.The sensitivity of pantograph and catenary parameters was sorted and also got the sensitive factors,optimal level and optimal combination of pantograph-catenary parameters by comparing different pantograph-catenary parameters combination of pantograph-catenary dynamic performance index,and also provided direction and measure for dynamic performance optimization of pantograph-catenary.The paper presents some suggestions to optimize the pantograph and catenary system dynamic performance of Wuhan Guangzhou high-speed railway on the basis of the above conclusions with considering its present situation,and verified by the simulation of pantograph-catenary.In order to optimize the dynamic performance of the pantograph-catenary system,it had better to adopt a light bow head,a large bow head stiffness,a moderate upper frame mass and stiffness,and a large lower frame between chassis hinge damping,which increased the stability of the pantograph.Under the condition of the speed of 350km/h,when the high-speed train is running in a single pantograph,in order to improve the quality of the collecting,the contact wire and the messenger cable with high tensile strength and small section area should be selected;When the double pantograph is used,the overhead catenary should adopts the appropriate tension combination and selects the larger cross-sectional area to improve the collecting quality of the rear bow.Increasing the tension of contact wire is more conducive to the steady operation of the pantograph,and the tension of the messenger cable should not be too large or too small.The equivalent mass of pantograph head is the most important factor that affects the dynamic performance of pantograph catenary.Pantograph parameters are more sensitive than catenary parameters.At the same time,the two sensitive parameters of pantograph and catenary are changed,and the dynamic performance of pantograph catenary is improved obviously.The results obtained by orthogonal test of pantograph and catenary can be used directly,and the dynamic performance of pantograph catenary is improved obviously.It is feasible to optimize the dynamic performance of pantograph catenary by orthogonal test method,which has a reference value for the optimization design of pantograph-catenary parameters.When the catenary of Wuhan Guangzhou high-speed railway equipped with SSS400+ pantograph,the contact force standard deviation and positioning point lifting are smaller than by using DSA380 pantograph.So the catenary of Wuhan Guangzhou high-speed railway obtain better dynamic performance by using pantograph of SSS400+.