中国机械工程

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基于花授粉算法的曲面薄壁件定位布局优化

王仲奇;李诚;杨勃;杨元   

  1. 西北工业大学现代设计与集成制造技术教育部重点实验室,西安,710072
  • 出版日期:2017-09-25 发布日期:2017-09-22
  • 基金资助:
    陕西省科技统筹创新工程计划资助项目(2016KTCQ01-50);
    陕西省自然科学基金资助项目(2016JM5011)
    Shaanxi Provincial Natural Science Foundation of China (No. 2016JM5011)

Fixture Locating Layout Optimization of Curved Thin-walled Parts Based on FDA

WANG Zhongqi;LI Cheng;YANG Bo;YANG Yuan   

  1. The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology,Northwestern Polytechnical University,Xi'an,710072
  • Online:2017-09-25 Published:2017-09-22
  • Supported by:
    Shaanxi Provincial Natural Science Foundation of China (No. 2016JM5011)

摘要: 优化定位布局是减小薄壁件装夹变形的重要手段,现有研究大多以节点法向变形最小为优化目标而忽略其他方向上的变形,为此提出了一种新的基于花授粉算法的夹具布局优化方法。针对曲面薄壁件,在建立法向约束定位模型的基础上,通过应变能来描述所有方向上的变形,以薄壁件的整体应变能最小为目标,结合花授粉算法和基于Python语言的参数化有限元分析,实现薄壁件的定位布局寻优。最后以飞机蒙皮定位布局优化为例验证方法的有效性,并通过与遗传算法的对比表明,花授粉算法在优化薄壁件的定位布局时具有更优的性能。

关键词: 薄壁件, 定位布局优化, 应变能, 花授粉算法

Abstract: Optimizing the fixture layout of the locating elements was an important means to reduce clamping deformations of thin-walled parts. The normal deformations were taken as the optimization objective in most of the previous studies, while the deformations in other directions were ignored. Based on FPA, a new method used to optimize the fixture locating layouts was proposed herein. At first, the locating model under normal constraints for curved thin-walled parts was established, the deformations in all directions were described by the strain energy. Then, this method, aimed at minimizing the overall strain energy of curved thin-walled parts, combined FPA and parametric finite element analysis based on Python language to realize the optimization of fixture locating layouts. Finally, the effectiveness of the proposed method was validated by the aircraft skin locating layout optimizations, and the comparison results with genetic algorithm(GA) show that the FPA outperforms the GA in terms of the convergence speed and robustness in the thin-walled part fixture locating layout optimization.

Key words: thin-walled part, fixture locating layout optimization, strain energy, flower pollination algorithm(FPA)

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