Abstract
The welding deformation directly affects the production quality and service life of the bogie, so controlling welding deformation is an important engineering problem in the production process of the bogie. In this paper, the side beam of freight train bogie is taken as the research object, the heat source of the local joint mode is checked based on the thermal elastic-plastic theory and the plastic strains are extracted to establish the inherent strain database with the welding simulation software.Then, the welding deformation of the whole side beam is carried out by using the inherent strain method based on thermal elastic-plastic theory. By quantitative analysis of the displacement deformation, the results show that simulation numerical results are similar to factory experimental data. At the same time the rationality and reliability of the established inherent strain database are verified. It is also proved that the inherent strain method based on thermal elastic-plastic theory is a fast and effective way to predict the welding deformation, which provides technical support for the prediction and control of the welding deformation of the whole frame of the fast freight train.
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