Numerical Simulation And Experimental Research Of Thin-Wall Plate Welding Process

Based on the state-of-the-art of welding process numerical simulation, the importance of numerical simulation of welding process was expounded and its deficiency at present was pointed out in the dissertation. The welding temperature field, stress, distortion evolvement processes and buckling distortion of thin-wall plate were analyzed by using ANSYS FEA software. The tests of welding heat cycle, residual stresses and distortion were carried out to validate simulation analysis results.The main research conclusions are listed as follows:1. The FEA model of thin-wall plate was established. An arrangement method of weld bead elements was developed according to the coordinates of weld bead element figure center, with which the elements of weld bead were activated step by step to simulate welding deposition process effectively in the welding process,2. The 3D welding temperature field of thin-wall plate was computed numerically by using three heat source models (Gaussian distribution, Double-ellipsoid distribution, and Birth-death element strategy). The differences of the computation results showed that Birth-death element strategy...