Research on the Finite Element Model of Box Structure with Complex Spatial Weld Seams

Abstract

To establish box structure model with complex space weld seams, the grid partition method is studied. The finite element model is established, and the deformation distribution of the box structure is obtained. The simulation results are verified. The results show that the deformation trend of the box structure is towards warp at the free edge of the left and right vertical plates. The deformation of the plate centre is inner concave. The maximum deformation is 1.714mm at the centre position of the vertical plate. The bottom pad is produced the extruding tendency. The deformation of the bottom pad near the two sides is about 0.51mm, which is more than the deformation of 0.34mm far away from the two vertical plates. The deformation of the front and back Z plate is not consistent. The long strip occurs wavy deformation. The deformation curve of the measuring point is similar to the simulation curve of the bottom pad deformation. There are 5 peaks of the long strip ranged from 0.08mm to 0.53mm. The deviation between simulation results and measurement results is within 0.45mm. The error meets the requirements of engineering application and can effectively guide production.