Analysis Of Residual Stress And Deformation For Side Beam On Bogie

In the railway vehicles, ships, engineering machinery and other industries, multi-layer and multi-pass welding is widely used. Due to the large size of these general welding structures, the correction of welding deformation after welding is difficult. So how to effectively reduce the multi-level multi-channel welding’s deformation is particularly important.Based on the technical key points and difficulties of multi-level multi-channel welding deformation simulation of the large components, irrespective of the phase change thermal cycle curve method and simplified bead of inherent strain is proposed. The former solution is mainly for low carbon steel’s welding deformation simulation. In this paper, the main research contents include:1. Using the thermal elastic-plastic finite element method in the simulation of standard connectors with and without considering phase transformation. After study the effect of the phase change of the welding deformation, put forward the thermal cycle curve method to low carbon steel material in view of the phase change, And the welding deformation simulation of the Y25type bogie side beam with multi-level multi-channel welding was carried out with this method, the welding deformation respectively to consider the parameters related welding process such as the different welding sequence and welding direction, different fixture clamping parts is studied, optimized the original process.2. In the case of larger thickness, and through simplifying the number of beads on the reactor pressure vessel support, established the bead weld inherent strain database after the simplified. And finish the welding deformation numerical simulation of the support with the use of the inherent strain database, predicting the welding deformation, and to provide reference for the establishment of welding procedure.3. In the calculation of inherent strain, for the first time the study adopted the ESI company VPS solver, more than600000nodes were calculated in ordinary workstation, and give a new view of the use and development of inherent strain method.