Research On The Interrelationship Of Catenary Parameters Based On Response Surface Methodology

With the increase of the train speed,the performance of pantograph catenary system is getting higher and higher.When the type and parameters of the pantograph are determined,the stability of the catenary has become the key to ensure the high speed operation of the train.At present,the study of catenary parameters is mainly through the univariate method,namely,under the premise of ensuring the other parameters are the same,just change one variable of many variables,to study the variable effect on the performance of the pantograph catenary system,without considering the interaction between parameters.In this paper,the response surface method is used to study the relationship between different parameters,and the influence of these parameters on the performance of pantograph catenary system,and the optimal parameters are obtained to improve the stability of the pantograph catenary system.Firstly,establish simple chain suspension finite element model of catenary and three-mass mass system model of pantograph and pantograph catenary coupling model,According to the established finite element model,the basic parameters of the catenary are simulated in ANSYS,get the performance of the pantograph catenary system under the basic parameters condition.Secondly,using the univariate method to independent analysis the catenary parameters,which include the contact line tension,the bearing tension,the structural height and the span and reference catenary system evaluation criteria,getting the influence of each parameter on the performance of pantograph catenary system.Then,according to the results obtained by the univariate method,three factors,the contact line tension,bearing tension and span,which have great influence on the performance of the pantograph catenary system,350 minus the contact force range and Contact force standard deviation of the two evaluation criteria as the response value of Y1 and Y2.Based on the design principle of Box-Behnken center combination experiment,three-factor three-level response surface analysis method was adopted to design the experiment,and the model of the two regression equation was obtained.Then,according to the variance analysis,we get the order of the influence of each factor on the performance of the pantograph catenary system,and the interaction between the parameters is obtained by analyzing contour maps and the three-dimensional maps.Finally,optimizing the model to get the best performance to get the best performance of catenary pantograph system parameters,then simulate after the optimum parameters are modified,the results are consistent with the predicted value of the response surface method,which is better than the basic parameters of the catenary Simulation results,the performance is more stable.