Optimization of weld sequences

确定最佳焊接顺序需要解决一个组合优化问题。尽管使用了支持设计焊接序列的快速模拟代码，但可能的组合数量使评估所有可能的组合变得不可行。将使用代理建模，其中开发的用于从少量解决方案组合中构建近似模型的方法确定了昂贵的更准确的仿真模型。代理模型旨在以更低的计算时间和成本尽可能接近地模拟精确模拟模型的行为。然后，该代理模型被用来在更大数量的组合中寻找在失真方面的最佳序列。然后，通过代理模型找到的最有希望的序列与昂贵的更准确的模拟模型进行核对。

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.