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将拓扑优化技术应用于大型飞机蒙皮拉形模的轻量化问题,可以解决传统拉形模设计中刚度与重量之间的矛盾。应用ABAQUS软件进行蒙皮拉形的非线性数值模拟,可以获取拉形模工作面的载荷数据。根据载荷数据选取的典型工况及给定的材料属性、约束条件等进行拓扑优化,将得到的拓扑优化结果进行模型重构,再对重构后的模型进行蒙皮拉形仿真,以验证模具的各项设计指标是否符合要求。以某型拉形模为例进行拓扑优化,并与传统设计的模具相比较,结果证明在同体分比的情况下,拓扑优化设计显著减小了模具的最大变形值和应力值。
Applying the topology optimization technology to the weight reduction of the large-scale aircraft skin pull mold can solve the contradiction between stiffness and weight in the traditional drawing mold design. Applying ABAQUS software to the non-linear numerical simulation of skin pull, the load data of pull face can be obtained. According to the typical working conditions selected by the load data and the given material properties and constraints, the topology optimization is carried out, and the topology optimization results obtained are rebuilt, and then the reconstructed model is subjected to skin pull simulation to verify the mold Whether the various design indicators meet the requirements. The topological optimization of a certain pull mold is compared with that of the traditional mold. The results show that the topology optimization design can significantly reduce the maximum deformation and stress of the mold under the same body fraction ratio.