提出了广义滑移线法，将经典滑移线理论拓展到能求解所有二维问题和轴对称塑性变形问题；
The generalized slip-line theory is advanced, which develops the classical slip-line theory and can be used to solve all two-dimensional problems and axisymmetric plastic deformation problems.
运用空间薄壁结构有限元理论，建立了能真实模拟人字门运行过程变形和应力规律的空间薄壁结构有限元数学模型；
With the Using of the thin-walled structure FEM theory, the FEM model is set up, which can reflects the distortion characteristic and stress distributing rule.
针对板料成形回弹精度问题的数值模拟，从理论上分析了凸模虚拟速度和板料虚拟密度对薄板变形能的影响。
For the simulation accuracy of springback problem in sheet metal forming, the effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.
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