One of the most important applications of superplastic technology is the die cavi-ty of superplastic extrusion. It not only can make die cavity with stable dimensions,complex shapes and clear profiles, but also has ad...One of the most important applications of superplastic technology is the die cavi-ty of superplastic extrusion. It not only can make die cavity with stable dimensions,complex shapes and clear profiles, but also has advantages of simple process, lowcost and time saving. Therefore, the superplastic technology is widely used展开更多
An Equilibrium Multi-objective Optimization Model（EMOM） with self-regulated weighting factors has been proposed for the optimum design of non-circular clearance hole on the front flange of turbine disk. In the ‘‘e...An Equilibrium Multi-objective Optimization Model（EMOM） with self-regulated weighting factors has been proposed for the optimum design of non-circular clearance hole on the front flange of turbine disk. In the ‘‘equilibrium design＂, both the stress decrease around the hole and the least hole＇s profile variation are considered, which balances two ambivalent design goals. Specific discrete variables are applied to realize the standardization design in the optimization process, in which a Surrogate Genetic Coding Algorithm（SGCA） is introduced, and a special check module is used to get rid of repeated fitness evaluation of the samples. The method offers an equilibrium design for the non-circular clearance hole of the turbine disk with great accuracy and efficiency.展开更多
基金Project supported by the National Natural Science Foundation of China, the result has been patented in China.
文摘One of the most important applications of superplastic technology is the die cavi-ty of superplastic extrusion. It not only can make die cavity with stable dimensions,complex shapes and clear profiles, but also has advantages of simple process, lowcost and time saving. Therefore, the superplastic technology is widely used
文摘An Equilibrium Multi-objective Optimization Model（EMOM） with self-regulated weighting factors has been proposed for the optimum design of non-circular clearance hole on the front flange of turbine disk. In the ‘‘equilibrium design＂, both the stress decrease around the hole and the least hole＇s profile variation are considered, which balances two ambivalent design goals. Specific discrete variables are applied to realize the standardization design in the optimization process, in which a Surrogate Genetic Coding Algorithm（SGCA） is introduced, and a special check module is used to get rid of repeated fitness evaluation of the samples. The method offers an equilibrium design for the non-circular clearance hole of the turbine disk with great accuracy and efficiency.
