边界界面动态接触约束与接触判断是3维复杂体积成形有限元数值模拟的关键技术问题之一。
One of the key technique problems is boundary dynamic contact constraint and contact judgment in FEA simulation for 3d complicated massive forming.
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.
此文提出了适用于金属体积成形过程有限元模拟的约束处理算法。
A new method for the treatment of constraints in finite element simulation of metal forming is put forward.
第二步，模拟实验条件，对模型施加边界约束，把实体模型转换为有限元的数学模型，并利用屈曲分析，对瓦楞纸板竖向边压的临界载荷进行计算。
Second, Simulating experiment condition, putting constraint on boundary of model, changing entity model to finite element model and using buckled analysis to calculate the CD critical load.
选取结构的任一个循环对称扇区作为有限元计算模型，建立单个扇区复约束特征值方程；
The presented method selects only one cyclic symmetric sector of the structure as the finite element calculating model and establishes the complex constrained eigenvalue equation of the sector.
采用大变形刚塑性有限元法模拟超塑性材料轴对称锥形模约束胀形过程。
The constrained superplastic bulging process is investigated by a large rigid-plastic finite element method.
从载荷的施加、约束的建立到网格单元的划分，本文详细介绍了混凝土泵车底架有限元模型的具体建立过程。
The concrete establishment progress of the truck mounted concrete pump's frame is presented from the exertion of loads, the establishment of restraints to the creation of meshes.
针对7ypj型农用三轮汽车齿轮箱体的结构特点，应用模态分析理论对其进行了约束模态的有限元分析。
Finite element analysis for constraint model was conducted on the gear box casing of 7ypj agricultural tricar using modal analytic theory according to its structural characteristics.
基于不变形预张力的基本概念，建立了斜拉桥成桥状态的多目标、多约束的优化模型，并通过有限元程序求解成桥索力。
Based on the basic concept of the un-deformed pretension of cable, the optimization model of finished state with multi-objective and multi-constraint is used.
通过建立预应力楼板的有限元平面模型，分析了框架-核心筒结构预应力楼板不考虑侧向约束影响时在正常使用荷载条件下的受力特点。
The finite element method is applied to prestressed slabs, the mechanical characters under the normal using load condition are analysised, with unconsidering the lateral restraints.
分析了三轴转向架构架在有限元计算分析时，约束的施加必须保证三根轴的轴重一致性；分析比较了中间轴一系簧垂向刚度对构架强度产生的影响。
When establishing finite element calculation model of three-axle bogie frame, it must be certain that the weight of each of the three axles is equal while adding restraint.
通过平截面计算假定，引入单元节点自由度的约束方程，提出了承载能力有限元计算的简化方法。
Based on plane section computational assumption, the constraint equations of element nodes' degree are used and the simplified finite element method is proposed.
正确给定位移约束条件是有限元法计算中必须考虑的重要问题。
It is an important problem to give the displacement constraints correctly in the computation with the finite element method.
本文通过引入弹性约束刚度矩阵和结构位移约束列阵，提出了结构有限元分析中处理阶跃型弹性约束的一种有效方法。
This paper presents a effective method dealing with step elastic supports in structural finite element analysis by inducing elastic support stiffness and structural displacement support matrices.
首先在第二种约束方式下，利用有限元模态分析方法对几种不同板厚的机架进行了动、静态分析，得到了机架变形、应力及各阶振型与频率。
First, using second constrain, the static state and dynamic analysis applied to the frame of a few thickness plates with FEM modal analysis, distortion, stress, vibration and frequency were gained.
基于有限元分析方法，对运煤敞车的结构简化、单元选取、边界及约束处理等建模技术进行阐述。
The structure simplification of the open boxcar, choosing elements type, and disposing the boundary and restriction of the model are introduced.
应用非线性无约束的优化技术，结合有限元计算，得到良好的优化设计。
Combining the nonrestrictive and nonlinear optimizing method with the finite element analysis, the optimum design can be obtained.
目的：探讨上颌骨三维有限元分析中较合理的边界约束条件的设定。
Objective: to discuss the rational boundary constraint design in finite element analysis of the whole edentulous maxillary and cranial skeleton.
给出了约束阻尼夹层板固有频率和损耗因子的一种有限元计算方法。
A numerical computation method of the natural frequency and the loss factor of the sandwich plate with constrained damping layer is given in this paper.
在有限元空间梁元模型的基础上，导出了考虑杆件约束扭转的薄壁梁元分析力学模型。
Based on the space beam element analytical model, a new thin-walled beam element model considering the restrained torsion was derived in this paper.
利用ANSYS程序对一种适用于网壳结构的屈曲约束支撑进行有限元分析，得到支撑的滞回曲线。
FEM analysis of a kind BRB applicable to space structures was conducted by using software ANSYS. The hysteresis curve of the BRB was obtained.
基于有限元计算软件ANSYS，结合工程实例，利用参数化设计语言APDL将拱坝等效应力应用于应力约束，进行拱坝体型优化设计。
With the ANSYS software and practical project example, the equivalent finite element stresses is applied in stress restriction for the shape optimization of arch dam by using APDL.
对于特定的线性几何约束条件，通过对约束条件下的初始自由度进行转换，将有限元方程转换为少自由度的无约束方程进行求解。
For certain geometry constraints, by transforming the constrained degrees of freedom, the reduced unconstrained degrees of freedom finite element solution was obtained.
根据有限元理论及最优化理论，同时考虑结构受力特点，给出了塔架体系在可靠度约束下的最优化设计方法。
Based on finite element theory and optimization theory, considering mechanical properties of the structure, the reliability optimization design method of tower truss system is presented.
结合科恩布赖茵拱坝的工程实例，就基础对拱坝坝体的约束效应进行了三维有限元分析，发现施工时预留的陡坎对拱坝坝体应力影响显著，同时建议拱坝施工时地基开挖成概化的地基界面。
Combining the engineering example of Klnbrein Arch Dam 200 m high in Austria, aimed at restriction effect between foundation and arch dam, the 3-D finite element analysis has been carried out.
在自密实混凝土与老混凝土约束收缩试验的基础上，本文采用大型有限元软件ABAQUS进行了新老混凝土粘结的约束收缩模拟，并与试验结果进行比较，以验证有限元模型的可行性。
Based on the test results of adherence of self-compacting concrete to old concrete, the restrained shrinkage of adhesion between new and old concrete is simulated by finite element program ABAQUS.
并考虑混凝土的内外约束及混凝土的徐变变形，用有限元法求解混凝土不利面的温度应力，并用大型有限元软件ANSYS对温度场和应力场进行了模拟。
According to consideration of restriction and creep deform in mass concrete, the temperature field and thermal stress are simulated through the finite element program ANSYS.
通过有限元算例分析，验证了约束方程连接的体壳连接方法在平板结构、带安装边的圆壳结构以及带安装座的壳结构上的适用性。
The applicability of the restriction-equations method in smooth structures, cylinder with fixture fringe and shell with fixture seat is validated by FEM analysis.
采用非线性有限元法对约束砌体横墙进行全过程分析，采用弹塑性时程分析法对原型结构进行地震反应分析；
Non linear analysis and a non linear dynamic time history analysis were made for the confined masonry wall and structures respectively.
采用非线性有限元法对约束砌体横墙进行全过程分析，采用弹塑性时程分析法对原型结构进行地震反应分析；
Non linear analysis and a non linear dynamic time history analysis were made for the confined masonry wall and structures respectively.
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