Finite Element Strength Analysis Of A Passenger Car Bogie Frame

China’s railway layout has made remarkable achievements,people rely on railway train travel is convenient and fast,the mileage of railway line is also increasing,so the safety and stability of railway train is directly related to the safety of everyone’s life.In the whole structure of railway passenger car,the performance of bogie plays a decisive role,bogie can not only carry the weight of the car body and the interaction force of wheel pair,but also ensure the smoothness of running in various lines.The performance of bogie mainly depends on its key component frame,so in order to improve the safety and stability of railway passenger car operation,the structural performance of frame has become the key of many researchers’ research and test.In this paper,the three-dimensional modeling software SolidWorks2019 is used to conduct three-dimensional solid modeling for the bogie frame of a railway passenger car.In the division of the finite element mesh of the solid model,the software Hyper Mesh is used to assign material attributes and load constraints at the same time.The international Railway Union standard(UIC615-4)is mainly used in the simulation calculation of the frame under abnormal load and normal operation conditions.The static strength of the frame is calculated in Ansys,and the results are viewed and analyzed in Hyper View.According to the stress concentration and weak connection in the stress cloud map,six risk assessment points are selected.Goodman fatigue limit diagram is used to check the fatigue strength of the structure according to the risk assessment point.According to the standard UIC615-4,the fatigue load condition was applied,and Weld Fatigue analysis software was used to estimate the fatigue life of 16 welds in the frame,and the fatigue life of each weld was obtained.Four welds under serious working conditions are analyzed.Finally,in order to test the stiffness of the frame,free modal analysis was carried out on the frame.The block Lanczos method was used to calculate the 10 th order modes.The lowest frequency obtained was 25.07 Hz,which was larger than the frequency of resonance,so the frame would not have resonance.