Based on analytical method of construction mechanics, the simulative computational FEM formulations about multi-stage excavation of underground chamber are prescribed.
基于施工力学的分析方法，建立了地下洞室分期开挖仿真计算的有限元列式。
Based on analytical method of construction mechanics, the simulative computational FEM formulations about multi-stage excavation of underground tunnel and timely shoring are prescribed.
基于施工力学的分析方法，建立了地下隧洞分期开挖、适时支护仿真计算的有限元列式。
In this paper, we attempt to discuss the conditions of closed orbit in more general -cases on the basis of the method of action-angle variables in analytical mechanics.
本文试图采用分析力学中作用角变量的方法，对一般情形下的轨道闭合条件进行讨论。
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