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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。
Optimizing the positioning and positioning is an important means to reduce the deformation of thin-walled parts. Most of the existing research focuses on minimizing the normal deformation of nodes and neglects the deformation in other directions. Therefore, a new algorithm based on flower pollination Fixture layout optimization methods. For curved thin-walled parts, based on the establishment of the normal constrained positioning model, the deformation in all directions is described by strain energy. The objective of this method is to minimize the overall strain energy of thin-walled parts. Combining with the flower pollination algorithm and parameters based on the Python language Finite element analysis, optimization of positioning and layout of thin-walled parts. Finally, the layout optimization of aircraft skin is taken as an example to verify the effectiveness of the method. The comparison with genetic algorithm shows that the flower pollination algorithm has better performance in optimizing the layout of thin-walled parts.