THERMAL SCIENCE

International Scientific Journal

Mišo B. Bjelić

,

Branko S. Radičević

,

Karel Kovanda

,

Ladislav Kolařík

,

Aleksandra V. Petrović

MULTI-OBJECTIVE CALIBRATION OF THE DOUBLE-ELLIPSOID HEAT SOURCE MODEL FOR GMAW PROCESS SIMULATION

ABSTRACT
The scope of application of simulation models in welding is limited by the accuracy of their output results. This paper presents a calibration procedure for a 3-D quasi-stationary model of heat transfer for gas metal arc welding. The double-ellipsoid heat source used in this model has five input parameters whose value cannot be specified accurately. To estimate these values, we employed a multi-objective calibration procedure with two objective functions using the paretosearch optimization algorithm. Objective functions represented the error between simulated and experimentally observed values of penetration depth and weld bead width during gas metal arc welding of P355GH steel plates. All input parameters were assumed to be a power function of line energy. To reduce computational time, we replaced the numerical model with a response surface methodology metamodel based on an optimal set of simulation results from the numerical model. The results of the simulations based on calculated values of input parameters for the heat source model showed excellent matching with the experimental results.
KEYWORDS
welding simulation, multi-objective calibration, double-ellipsoid heat source, RSM
PAPER SUBMITTED: 2021-01-31
PAPER REVISED: 2021-03-26
PAPER ACCEPTED: 2021-04-02
PUBLISHED ONLINE: 2021-05-16
DOI REFERENCE: https://doi.org/10.2298/TSCI210131181B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 3, PAGES [2081 - 2092]
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Multi-objective calibration of the double-ellipsoid heat source model for GMAW process simulation

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence