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A finite element model is established for a featured opening valve flow channel. The finite element analyses for fluid flowing in the valve flow channel were completed by Fluent. Repeated simulations for many times were completed with fixed inlet pressure and varied outlet velocity. Finally, the valve cavitation critical speed was got in this featured opening. In the valve cavitation critical speed,...
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 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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