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.
由于实际测量数据具有非线性特征，加上校正样本集合的有限性，使得解决小样本条件下非线性关系的模型传递问题显得尤为重要。
Because of nonlinear effect and small calibration sample set in fact, it is important to solve the problem of model transfer under the condition of nonlinear effect in evidence and small sample set.
有限元模型用质量和刚度参数表示，这些参数由正交条件和特征方程的加权欧氏范数取极小值来确定。
The finite element model is expressed by mass and stiffness parameters, which are determined by minimization of weighted Euclidean, norms of orthogonality conditions and characteristics equations.
BERMAN修正方法基于无阻尼系统的模态正交条件，利用实验模态矩阵和特征值对有限元理论模型进行修正。
BERMAN updating arithmetic makes use of experimental model matrix and eigenvalue to modify the finite element academic model, based on the model orthographical condition of non-damping system.
证明了当特征值，特征函数及控制支撑点满足某些条件时系统的整体近似能控与有限维精确能控性。
This system is globally approximately controllable and finite-dimensional exactly controllable when the eigenvalues, eigenfunctions and the points which support the controls satisfy some assumptions.
采用粘弹塑性有限元方法对管接头焊后不同局部热处理条件下应力分布特征进行了研究。
The characteristics of stress distribution in local PWHT for tubular joints have been studied using viscoelastic plastic FEM.
采用三维有限元数值模型，分析圆梁山隧道高水压条件下衬砌结构受力及变形特征。
The mechanical behavior and deformation characteristics of lining structure in Yuanliangshan tunnel under high water pressure was analyzed by using 3d FEM numerical model.
介绍了在厚覆盖岩层条件下，确定地下采矿引起地表变形特征的三维有限元弹塑性计算分析工作。
The analysis of 3D elasto-plastic FEM is introduced for calculating the deformation of the ground surface caused by underground mining under thick rock overburden.
介绍了在厚覆盖岩层条件下，确定地下采矿引起地表变形特征的三维有限元弹塑性计算分析工作。
The analysis of 3D elasto-plastic FEM is introduced for calculating the deformation of the ground surface caused by underground mining under thick rock overburden.
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