基于支承法兰盘的结构特征，通过目标函数的建立、设计变量的选取以及约束条件的确定建立了优化设计的有限元模型，并对法兰盘进行了静力分析。
Based on the structural characteristics of bearing flange, the optimization model is established according to the objective function, design variables and constraints, and make a static analysis.
用有限元数值模型，分析隧道断面上8个不同位置10种不同水压突水条件下衬砌结构的受力特征。
Mechanical behavior of lining structure is analyzed under 10 different conditions that high water pressure suddenly effluent water upon 8 different parts of tunnel section with FEM numerical model.
利用奇点和有限集的特征，给出了首次积分存在的某些条件。
Some conditions on the existence of the first integral are given via the properties of equilibria and limit sets.
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