Analysis of Reasonable Evaluation Indicators for Structural Disease in Turnout Areas Based on Vehicle Vibration Response
In order to better evaluate the structural irregularities of high speed turnouts,fully considering the influence of elastic body vibration modes of key components such as vehicle,bogie,and wheel,as well as the mutual constraint relationship between turnout components,a flexible coupling dynamic simulation model of the vehicle-turnout system was established.The influence laws and sensitivity indicators of typical structural disease of switch rails and point rails,which includes reduction value deviation and insufficient displacement,on vibration response were analyzed,and reasonable evaluation indicators for typical structural disease were clarified.Based on the probability statistical analysis of a large amount of detection data,the usual control values for evaluation indicators were provided.The results indicate that it is advisable to select the wheel-rail vertical force as the evaluation index for the deviation of the reduction values of the switch rails and point rails,The typical management values of the wheel-rail vertical force on the basic rail side and the straight point rail side are 65.0 kN and 67.7 kN,respectively.It is advisable to select the lateral acceleration of the vehicle body as the evaluation index for the insufficient displacement deviation of the switch rails and point rails.The usual management value for the lateral acceleration of the vehicle body is 0.05g.
high speed turnoutsstructural irregularitiesnumerical simulationreduction value deviationinsufficient displacement
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