FEA Solutions for Simulating Multi-workpiece and Multi-process in Manufacturing Process of Submarine Welded Pressure Hull

To realize the numerical simulation of multi-workpiece and multi-process, two difficulties encountered in continuous finite element analysis (FEA) were brought forward firstly. Then the theoretical basis of merging measured initial residual stresses into FEA models was discussed. Based on which the mapping method of multi-model in continuous FEA was put forward. This method can be potentially used to realize such continuous FEA as manufacturing of welded submarine pressure hull by transferring the finite element analysis results between different processes and workpieces. No commercial FEA codes can give perfect solutions to these transfer processes at present. The commercial FEA code MSC.Marc was used as the FEA platform to realize simplifying analysis. Because of all the welding processes are multi-process, so the mapping method of multi-model in continuous FEA can be potential used in the welding simulation to make the calculating results be accurate.