有限元法

Meth od: The impl ants were studied by supper SAP93 program under the force of 0.8 s period b y the way of half sine wane.In group A the implants were without countersink, wh ile in group B those were with countersink.

采用三维有限元动态分析法，以Supper SAP93程序在周期为0.8 s的正弦半波力作用下对两种种植体进行应力分析，A组无防沉装置，B组有防沉装置。

It is based on the discrete model of finite analysis to get curvature ,normal vector, direction and geodesic curve,then to analyze and design the structure.

基于有限元分析的离散模型，将离散微分几何领域的最新成果运用于膜结构设计，求解曲面曲率，法向量，主方向及测地线，进行结构分析设计。

Then, for the first time, a finite element model of the cylindrical shell surface was bring forward and set up.

首次提出和建立了柱体坐标系下的曲面柱壳单元有限元模型，以及在柱坐标系下的边界元法基本方程和柱坐标系下无限域与半无限域基本解。

By the instance of pressured dentate disc basic thought and key step realized on ANSYS in structure optimization design has been introduced.

这其中较实用的优化设计系统构造方法是优化准则法与大型有限元分析程序的软件集成化[1]。

The algorithm can give the solution of resultant finite element equations by means of the combination of direct Crout decomposition method and blocking technology. Thereby, we have solved the problem that the computer stops running the program because of not enough memory.

该算法采用直接法中克劳特分解法与分块技术相结合来求解已合成的总体有限元方程组，从而解决了计算机因内存有限而使程序经常死机的问题。

With Lagrange multiplier ,Dirichlet boundary conditions are imposed along the essential boundaries.

在有限元三维20结点单元构成的空间网格上构建流形覆盖和权函数，采用拉格朗日乘子法施加位移约束条件，推导了分析静态问题的计算列式。

A finite element incremental weighted iteration method, which can avoid divergency and speed up the convergence process,was proposed to solve the problems of tubing buckling in deviated wells.

建立了直井中有重钻柱非线性屈曲平衡方程及相应的泛函表达式，构造了一种能避免发散并加速收敛的有限元增量加权迭代法求解斜直井中钻柱屈曲问题，首次采用直接求解非线性特征值的方法来分析钻柱屈曲问题。

A high order finite element model of a duralumin flexible beam with distributed piezoelectric sensors and actuators was presented in this paper. The beam equation was developed incorporating the stiffness, mass and electromechanical coupling effects of the piezoelectric apparatuses.

本文针对一套表面粘贴有分布式压电传感器和致动器的LY12智能材料柔性臂系统，在对系统组成进行分析的基础上，建立了柔性臂实验系统的有限元模型，并采用自由度凝聚法对该模型进行了降阶处理，以方便控制器设计。

In theoretical investigations, elastic strain energy method, fiber inclination model, three cells model ...

在理论研究方面，介绍了弹性应变能法、纤维倾斜模型、三细胞模型和有限元模型等工作。

Based on the continuity equation of groundwater and the normal velocity formula of free surface, taking element e as a subdomain R in the seepage flow domain R, according to variation principle, the finite element equation of seepage field can be obtained.

由地下水的连续方程和自由面的法向流速公式，把单元e作为渗流求解区域R上的一个子域ΔR，根据变分原理，得到岩土体渗流场有限元方程。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。