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Simulation models of welding processes allow us to predict influence of   welding parameters on the temperature field during welding and by means of   temperature field and the influence to the weld geometry and microstructure.   This article presents a numerical, finite-difference based model of heat   transfer during welding of thin sheets. Unfortunately, accuracy of the model   depends on many parameters, which cannot be accurately prescribed. In order   to solve this problem, we have used simulated annealing optimization method   in combination with presented numerical model. This way, we were able to   determine uncertain values of heat source parameters, arc efficiency,   emissivity and enhanced conductivity. The calibration procedure was made   using thermocouple measurements of temperatures during welding for P355GH   steel. The obtained results were used as input for simulation run. The   results of simulation showed that represented calibration procedure could   significantly improve reliability of heat transfer model. [National CEEPUS   Office of Czech Republic (project CIII-HR-0108-07-1314) and to the Ministry   of Education and Science of the Republic of Serbia (project TR37020)

thermal science/thermal science

Numerical modeling of two-dimensional heat-transfer and temperature-based calibration using simulated annealing optimization method: Application to gas metal arc welding