Strength Analysis About Aluminum-alloy Car Body Structure Of EMU

The high-speed train holds the extremely important position in the high-speed railroad technology. While the high-speed train body is one of the most important parts in the high-speed train, its performance is firmly correlative with the train security, the reliability, the comfortableness, the environmental protection, therefore the car body technology is one of the high-speed train essential technology.The sixth accelerating speed of China railway and the high speed train bought from some foreign countries are briefly introduced, mainly the car body of CRH5 from Alston of the France is told in the paper. The car body which model is build by ANSYS is analyzed by FEM under static load case, fatigue load case, succor load case, air strength load case and so on, twenty-first load cases, according to EN12663. The tide and rang of the stress and the large stress position are found, which value is contrasted with the standard as well as the displacement in the vertical plane .The results indicate that the strength and stiffness of the car body satisfy the norm to provide a basis for our own designed EMU. The elastic mode analysis is done to find the first order reversal bend in vertical plane frequency is acceptable in accordance with specification as well as the mode.The result is contrasted with the oral analysis to find the difference which is analyzed to find the reason in some load cases which the difference is big. Constraint equation and surface element are analyzed to find the influence and extent to the car body. The paper is a basis for further work.