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Railway vehicle structures endured multiaxial fatigue loads in the service process, which aroused many difficulties for bogie frame's design and analysis. In this paper, firstly, the basic theory of multi-axial fatigue was explained. Secondly, the modeling methods of finite element analysis and stress state under standard loads were analyzed. Finally, three methods (maximum principal stress, Mises...
In this paper, the fracture problems appearing in operation and the reasons of the welded bogie frames of railway vehicles were explained firstly, and the current design situation of fatigue life and reliability of bogie frame were summarized. The railway vehicle design standard, which plays a decisive role in the bogie frame design, was analyzed. The traditional determining value method by using...
In order to study the influence of the flexible bogie frame on the vehicle system dynamic performance, the rigid bogie frame was replaced by the flexible bogie frame when the dynamic model was built. Based on the substructure method, the DOFs of the bogie frame finite element model were reduced by the Guyan method. When the results of full DOFs modal analysis were consistent with the results of reduced...
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