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平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。计算结果得到实验验证。
Forging is a plastic deformation problem. In this paper, the follow-up coordinate system is used to track the mass of the flow, and the energy displacement method is used to calculate the increment of mass displacement and equivalent strain field step by step. The calculation results are verified by experiments.