Several Key Technologies of the Computer Simulation of the Welding Process

The key technologies at which the computer simulation of welding process aims include meshing model, applying loads as well as handling molten pool. A transitional mesh division is proposed to establish the finite element model to solve the contradiction between the calculation accuracy and the computing time; With the application of the multiple load step, the functional relationship between the node number and the surface load is established to implement the loading of the moving heat source model scattered in the functional pattern; by the birth-death element method, the element exceeding the melting point will die out in order to cope with the zero-stress state of the pool; Taking plate surfacing as an example, the simulation calculation result matches with the fact, which proves that the proposed measures are feasible and effective.