实践证明，反向模拟技术对于预成形优化设计是一种非常有效的方法。
The practice proves the reverse simulation technique is a very efficient approach to optimize the preform design.
反向模拟结合了塑性形变理论和有限元技术，直接由工件反算出毛坯。
Raverse analysis, based on the plasticity theory of deformation and FEM, however, can calculate the blank contour directly from a given part.
采用DEFORM 3d软件，通过正向模拟验证了反向模拟所获得的预成形毛坯的合理性。
The rationality of preformed billet is testified through forward simulation by software DEFORM3D.
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