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OPTIMIZATION OF LOADING PATHS FOR A T-SHAPED TUBE HYDROFORMED PART

机译:T形管液压成型零件的加载路径的优化

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摘要

In this study, an optimization procedure for improving existing tube hydroforming (THF) process designs is presented. A finite element model of process components has been constructed and validated against published results from a previous study. The validated model was used in simulations to develop parameters for evaluating the success of a THF process design in terms of part failure, conformity, and thickness distribution. An optimization statement for improving THF processes was formulated using these parameters, and loading conditions were used as the design variables by defining the axial feed and internal pressure loading profiles in terms of piecewise curves. A sequential quadratic programming (SQP) method, which is one of the most effective algorithms for nonlinear problems, was chosen for implementation. To demonstrate the capability of the optimization procedure, it was applied to a T-Shape THF component. Simulation results on the part formed using the optimized loading curves showed improvements to both conformity and thickness distribution.
机译:在这项研究中,提出了一种改进现有管件液压成型(THF)工艺设计的优化程序。已经构建了过程组件的有限元模型,并根据先前研究的已发布结果进行了验证。经过验证的模型用于仿真,以开发用于评估THF工艺设计是否成功的参数,包括零件失效,合格性和厚度分布。使用这些参数制定了用于改善THF工艺的优化声明,并且通过以分段曲线的形式定义轴向进料和内部压力负荷曲线,将负荷条件用作设计变量。选择了一种实现非线性问题的最有效算法之一的顺序二次规划(SQP)方法。为了证明优化程序的功能,将其应用于T形THF组件。使用优化的载荷曲线对零件进行的仿真结果表明,对贴合度和厚度分布的改进。

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