Optimization of weld sequences

焊接顺序的优化

• 批准号: 500416-2016
• 负责人: Goldak, John
• 金额: $ 1.82万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=608089
• 关键词: Optimization; weld; sequences

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.

确定最佳焊接顺序需要求解组合优化问题。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得对所有可能的组合进行评估是不可行的。如果开发的方法是从少量的解决方案组合中构建近似模型，则将采用替代建模，从而确定昂贵的更准确的模拟模型。代理模型被设计为以低得多的计算时间和成本尽可能接近地模拟精确仿真模型的行为。然后使用该代理模型在大量组合中找到失真方面的最佳序列。最有希望的序列发现的代理模型，然后检查昂贵的更准确的模拟模型。