Numerical modeling of two-dimensional heat-transfer and temperature-based calibration using simulated annealing optimization method: Application to gas metal arc welding
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2016-01-01
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| Series: | Thermal Science |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2016/0354-98361500127B.pdf |
| Summary: | 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)] |
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| ISSN: | 0354-9836 2334-7163 |