Strength Analysis And Optimization Of Bogie Frame

With the rapid development of high-speed railway,the carrying capacity and running speed of high-speed trains have been continuously improved,and the safety of high-speed trains has attracted more and more attention.As a key component of high-speed train,bogie frame both to bear the gravity load from the body and the load caused by the influence of track irregularity,so the force is very complex.Therefore,it is necessary to study the strength and stiffness of the bogie frame.At the same time,in order to reduce the running energy consumption and manufacturing cost of the vehicle,it is also an important research direction to optimize the lightweight design of the vehicle on the premise of ensuring the safety of the train.Based on a certain type of motor car bogie frame as the research object,the security problems of train bogie frame and the research on the optimization design problem are the following:(1)The loading condition is applied according to the standard of UIC615-4,and the geometric model of bogie frame was meshed through the Hypermesh,so as to establish the finite element model of the frame.(2)The unconstrained free modal analysis of the frame and the static strength calculation under abnormal load condition were carried out by the software of Ansys.According to the fatigue linear cumulative damage theory,the fatigue strength of bogie frame was calculated by nominal stress method,and the fatigue strength was checked and analyzed according to the BS standard--"practical rules for fatigue design and evaluation of steel structure",and the fatigue cumulative damage ratio of frame was calculated by using the program of Matlab.(3)According to the above calculation results,the security check analysis of the framework is carried out.(4)The Optistruct is used to optimize the design of the architecture.Firstly,the problems in the security checking of some parts are solved,and then the lightweight optimization of the architecture is carried out.(5)Modify the model parameters according to the optimization results,and the unconstrained free mode,static strength and fatigue strength were analyzed again to verify the rationality of the optimization results.Through the above research,the safety check of bogie frame is first completed,and the structure analysis of bogie frame is carried out according to the check results.Then,the strength of the weak part of the structure is improved by optimizing the design;Reduces the overall quality of the architecture.Finally,under the premise of meeting the requirements of various standards,the optimization goal of bogie frame lightweight is realized.The above research provides certain reference value for the maintenance and optimization design of bogie frame in the future.