The plastic process analyses on uniform and non-uniform cylindrical upsetting were made in detail on the basis of the principle of generalized variational inequality with friction. 基于摩擦约束广义变分不式原理，对圆柱体均匀镦粗和圆柱体非均匀镦粗金属成形工艺问题进行详细的塑性加工工步分析。
The general variational principle is employed in communicating information between subdomains with Lagrange multipliers, which yields a reduced-order coarse problem. 根据广义变分原理，采用拉格朗日乘子在子区域之间交换信息，并建立其相应的粗问题。
