Optimization of weld sequences

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Determining the optimal weld sequence requires solving a combinatorial optimization problem. Despite the use of fast simulation codes that support the design weld sequences, the number of possible combinations makes evaluation of all possible combinations unfeasible. Surrogate modeling will be employed where the method developed to construct an approximate model from a small number of combinations of solutions determined an expensive more accurate simulation model. The surrogate model is designed to mimic the behavior of the accurate simulation model as closely as possible, at a much lower computational time and cost. This surrogate model is then used to find the best sequences in terms of distortion in a much larger number of combinations. The most promising sequences found by the surrogate model are then checked with the expensive more accurate simulation model.