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介绍了提高板料成形有限元分析中采用的几种典型的等效拉延筋模型，并指出了采用等效模型的优缺点及今后的研究方向。
Some typical equivalent drawbead models used in the finite element analysis of sheet metal forming are introduced. The advantages and disadvantages of the equivalent model and the future research directions are also pointed out.