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本文利用假设剪切应变和薄膜应变场的新型退化壳单元，并考虑大应变影响对壳体结构弹塑性动态分析进行了研究，并编制了相应的程序；此程序采用修正的Ｌａｇｒａｎｇｉａｎ公式，它不仅考虑了大变形大应变的影响，还对单元的节点坐标和厚度在每个时间步后都给予修正。通过对一些算例计算表明，此程序数值精度很好，可用于壳体结构的工程分析。并得出结论，对于大应变问题考虑和忽略大应变影响将有较大的不同。
In this paper, a new degenerate shell element with assumed shear strain and thin film strain field is used, and the elastic-plastic dynamic analysis of the shell structure is studied considering the influence of large strain, and the corresponding program is compiled; this procedure uses the modified Lagrangian formula, which is not only Considering the effects of large strain and large strains, the coordinates and thickness of the element's nodes are also corrected after each time step. The calculation of some examples shows that this program has good numerical accuracy and can be used for engineering analysis of the shell structure. It is concluded that there will be great differences in considering and ignoring the effects of large strains on large strain problems.