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首页> 外文期刊>Computers & Structures >Internal pressure and counterpunch action design in Y-shaped tube hydroforming processes: A multi-objective optimisation approach
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Internal pressure and counterpunch action design in Y-shaped tube hydroforming processes: A multi-objective optimisation approach

机译：Y型管液压成型过程中的内部压力和反冲动作设计：多目标优化方法

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摘要

In sheet metal forming most of the problems are multi-objective problems, generally characterised by conflicting objectives. A classical approach to investigate such kind of problems is focused on a combination of multiple objectives into a unique objective function to be optimised. Actually, in metal forming processes optimisation two main phases have to be developed in order to reach an optimal solution: the former is the modelling phase (definition of the design variables and objective function) and the latter concerns the computational aspect (numerical simulations or experiment to be developed). In this paper, an integration between numerical simulations, response surface methodology and Pareto optimal solution search techniques was applied in order to design a complex Y shaped tube hydroforming. In particular, the calibration of internal fluid pressure and counterpunch action was investigated with the aim to achieve three different quality objectives: minimization of thinning, reduction of underfilling and accuracy of the final fillet radius at the bulge zone corner.
机译：在钣金成形中，大多数问题是多目标问题，通常以目标冲突为特征。研究此类问题的经典方法着眼于将多个目标组合成要优化的唯一目标函数。实际上，在金属成型过程中，为了达到最佳解决方案，必须开发两个主要阶段：前一个阶段是建模阶段（设计变量和目标函数的定义），而后者则涉及计算方面（数值模拟或实验）待开发）。在本文中，将数值模拟，响应面方法和Pareto最优解搜索技术进行了集成，以设计复杂的Y形管液压成形。尤其是，为了达到三个不同的质量目标，对内部流体压力和反冲动作的校准进行了研究：最小化变薄，减少底部填充和在凸出区域拐角处最终圆角半径的准确性。

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