有限元法

The hidden functions in the dynamics model are found out by using numerical methods such as Runge Kutta method and Finite Element method.

设计一种基于压杆屈曲原理的数字微镜装置，针对该装置建立机电动力学模型，应用龙格库塔法和有限元数值方法求解其动力学模型中的隐函数。

Metal packaging materials; scratch test; coating/substrate system; finite element modeling

金属包装材料；划痕法；涂层/基底体系；有限元模拟

The characteristic of this model is:a new interface edge singular element model is derived based on the numerical fundamental solutions obtained from the finite element eigensolutions method.

该模型的独特之处在于：基于有限元特征法得到的奇异性场数值特征解建立了一种新型界面端奇异单元。

The bilinear elastic-plastic constitutive relations of Zeolite sodalite and ferrierite crystals were gained from a number of finite element simulations using search method.

基于弹塑性双线性本构关系假定，用ANSYS有限元程序模拟纳米压痕实验过程，利用搜索法得到沸石大单晶SOD和FER的双线性本构关系。

Furthermore,the stability behavior and accuracy characteristics of the algorithmare proven by a spectral decomposition method.

在前人工作的基础上，提出了一种新的用于解决结构动力分析问题的时间积分方法——Taylor级数方法；建立了求解线性问题和非线性项可以表示为多元多项式形式的非线性问题的Taylor级数方法的理论，并给出递归求解通式；阐述了该方法的程序实施过程，给出了计算流程图，并在非线性有限元分析平台NFAP中嵌入了Taylor级数方法的计算模块；利用谱分解的方法分析了该方法的稳定性和精度特性，以封闭的解析形式给出了描述积分法特性的周期延长率和振幅衰减率的表达式；通过对该方法的理论分析和特性研究，阐述了该方法的可行性和高效性。

One way is to regard them as the random variables submit to a certain distribution; another is to take them as a random process—— we derive random variables form any of its function's time development, and, the diffusion equation could be partially approached by a equation which is similar to the Ito stochastic integral equation so that the Ito stochastic integral equation is inter-related with the diffusion equation. Therefore, this process could basically reflect the uncertainty in different models.

PSFEM法是假定基本随机变量在均值点处产生微小摄动，利用Taylor级数把随机变量表示为确定部分和由摄动引起的随机部分，从而将有限元控制方程转化为一组线性的递推方程，求解得出位移的统计特性，进而求出应力的统计特性。

Meanwhile, with the finite element method with triangleas its basic unit, the numerical method to solve stope temperatur question is discussed.

同时，讨论了以三角形作为基本单元的有限元求解温度的数值法。

With this structure,the deformation of the movable plate of the capacitive pressure sensor will tend to flat when applying a load of pressure,so that the nonlinearity of stray capacitance near the edge of the entire structure is decreased and the output properties of the sensor is improved.

利用有限元方法分析了不同尺寸的动极板在不同外加压力作用下压力与形变的关系，以及相应的应力分布情况，并采用最小二乘拟合直线法计算了压力传感器的线性度。

The 3-D thermal weight function method was proposed, in which the works ussually done for finite element stress analyses for every time instants could be avoided, and the transient stress intensity factor of a body subjected to thermal shock can be calculated through direct integration of products of temperature fields and TWF.

在国际上首次以三维热权函数法为核心，绕过对每一时刻有限元应力分析这一步，直接通过温度场与热权函数的乘积的积分来计算热冲击应力强度因子K的过渡过程，极大地提高了计算效率。

An algorithm of automatic generation of finite element mesh for tee s,based on subregion method,is introduced.

基于分块剖分法，提出一种适用于三通管件的有限元网格自动生成的方法，并详细讨论了计算结点坐标的算法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。