模具存放于一个矩形的空间，可存放直径最大为300 mm，厚度为200 mm的模具，最大模具重量为220公斤。
The dies, stored in flat layers, have maximum diameter 300 mm, maximum depth 200 mm and maximum individual weight 220 kg.
以结构的总重量最小和结构的总应变能最大为优化目标，以导管的平均直径和壁厚作为设计变量，考虑强度、刚度和稳定等约束条件。
Total weight and seismic strain energy of the structure were selected to be optimal objectives. Average diameter and wall thickness of the structural element were taken as design variables.
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