Performance Analysis Of Key Components On High-Speed Train Bogie

With the rapid development of our country’s high-speed railway, the lines for passengertrain are constantly built and open to traffic, domestic train unit CRH3, CRH5type has beenput into operation. Bogie is one of the key components of railway vehicle, and whether thedesign of it is reasonable directly affects the safety, stability and reliability of vehicleoperation. It is urgent to develop the anti-fatigue design of bogie in the design phase.Based on present research about bogie performance analysis for domestic and abroadpassenger train, the bogie load-carrying is summarized in this paper. In the current staticstrength evaluation standard of bogie frame, emphatically introduces the international railwayunion standard (UIC515-4, UIC615-4), and in the structural fatigue evaluation standard, thetheoretical basis and calculation principle of JIS and ASME standard are respectivelyanalyzed, then theoretically compares the two theory methods, finally summarizes the uniqueadvantage of the master S-N curve method in ASME.Taking a welding frame of high-speed motor car bogie as the research object, first of all,according to the static strength test specification, the static strength calculation is done to thebogie, including52kinds of special operation load condition,17kinds of main operation loadcondition and10kinds of exceed constant load condition. The maximum Von. Mises stress ofbogie frame under each operating conditions is less than the allowable stress, namely thestatic strength of bogie frame meets the design requirements. Compares the calculated resultsand experimental results, the overall find to be consistent, and prove the model and theaccuracy of the calculation results. Secondly, to test the self-developed fatigue life predictionsystem of welding structure based on the master S-N curve method is effective or not, thepaper takes a key part of car body to predict its fatigue life, through the contrast of thenumerical simulation analysis results and the fatigue test results, it is known that thecalculated results and test results are close with a margin of error of5%, prove thepracticability and effectiveness of the prediction system; Finally, applies the system platformto analyze the stress concentration of the key weld and predict the fatigue life for the bogieframe, and in the serious damage position, adopts the method of topological optimization tooptimize the structure, results show that after optimization the weld stress concentration leveland total damage in this position reduce markedly, achieve the purpose of bogie frameoptimization.This subject get the support of international scientific and technological cooperationproject " Development of maximum operating speed of380Km/h high speed EMU "(topicnumber:2010DFB80050).