Research and verification of welding heat source parameter optimization model

Accurate simulations of the temperature field during welding are important for analyzing welding residual stresses and material deformation. The welding temperature field is directly related to the shape parameters of the heat source. However, the heat source shape parameter determination is generally a trial and error process with the efficiency and accuracy highly dependent on the researcher experience. This paper presents an optimization model for determining the heat source parameters during welding which can be used to estimate the shape parameters of various heat sources. Finite element simulations with the optimized parameters compared well with experimental data. The results show that this optimization method reduces the cost of repeated modeling to obtain the optimal heat source parameters, which also reduces the influence of the researchers' experience on the efficiency and accuracy of welding temperature simulations.