Research on Multiple Load Decoupling Identification Technology for Heavy Haul Freight Train Coupler
The structural characteristic response of the coupler,as a key connecting component of heavy-haul freight trains,is a coupled mechanical problem of multivariate loads such as longitudinal stretching,vertical nodding,horizontal hunting.In view of traditional theoretical research and monitoring methods focusing on longitudinal loads,and little re-search on the decoupling identification theory and methods for lateral and vertical loads on train couplers,this paper pro-posed a multivariate load decoupling identification method for heavy-haul freight train couplers.Firstly,considering the coupling mechanics of longitudinal load,horizontal hunting load and vertical nodding load of the coupler structure,a multivariate load recognition theory model of the strain sensing surface based on the structural characteristics of the cou-pler was established.Then,seven load decoupling methods were characterized by the multivariate load identification model,with the relationship coefficients between load and strain obtained through finite element numerical simulation.The robustness and recognition relative error of the seven multivariate load decoupling recognition were verified by cou-pling random loading.The results show that the multiple load decoupling identification method for the coupler can decou-ple the three-way load of the coupler,and the recognition accuracy of the fourth way to decouple solution of the seven decoupling methods is the highest,with a recognition accuracy of less than 5％for multivariate loads,which can meet the actual engineering application needs.
heavy haul traincoupler forcemultiple loadnumerical analysis
万方数据
维普
