Strength Analysis Of Bogie Frame Structure For High Speed Maglev Vehicle

At present,China is conducting research on high-speed maglev transportation technology,and high-speed maglev vehicles are new rail vehicles with development prospects.The structural performance of structural components of high-speed maglev vehicles is a problem that must be considered in the development of vehicles.Among them,the structure of the bogie directly determines the safety of the train.It is an indispensable core component of the highspeed maglev vehicles.The structural performance of the train directly determines the safety and stability of the vehicle during its use.Therefore,based on the structural characteristics and the use environment of the current high-speed maglev vehicle bogie structure,the paper studies the structural static strength performance and structural fatigue strength performance of the bogie frame structure.In this paper,based on GB/T33582-2017 "General Rules for Finite Element Mechanics Analysis of Mechanical Product Structure" and related literatures,the principles and methods for the creation of finite element models of mechanical structures are summarized,and the structural features of the main components of the structure of the maglev vehicle and the components are the connection relationship is analyzed in detail.On this basis,the fine finite element model of the high-speed maglev vehicle travel structure is created according to the principle and method of mechanical structure finite element model creation.Referring to the main load calculation method and main working conditions of the wheel-rail vehicle bogie,combined with the structural characteristics and use conditions of the high-speed maglev vehicle bogie structure,the calculation method of the main load of the high-speed maglev vehicle bogie structure and the main working conditions are analyzed.The main load of the high-speed maglev vehicle bogie frame was calculated and the main working conditions were drawn up.Based on the fine finite element model and simulation boundary conditions of the high-speed maglev vehicle bogie frame,the structural static strength and structural fatigue strength simulation calculations are carried out on the high-speed maglev vehicle bogie structure.The fourth strength theory and the Goodman fatigue recommended by UICOREB12/RP17 are adopted.The limit diagram checks the static strength and fatigue strength of the bogie frame structure separately,and obtains the following conclusions:The maximum Von Mises stress of the bogie frame under the six extraordinary load conditions is 198.182 MPa,and the internal rib of the air spring mount is present.The safety factor is 1.31,which is greater than the check value of 1.15,indicating that the structural strength of the frame is proposed in this paper.Meet the requirements of use under abnormal load conditions.According to the static strength simulation calculation results of the bogie under the simulated running load condition,the Goodman fatigue limit diagram is used for the fatigue check of the 90 key points on the bogie frame structure,and all the nodes fall in the fatigue limit chart package.Within the line,the part is shown to meet the fatigue strength requirements.