有限元法

The hot intensity of the heat insulation parts is analysized by the finite element method.

论述了低散热发动机在特种车辆上应用的意义及研制存在的困难；分析了低散热发动机的传热特点，运用经验公式确定了传热边界条件；分析了非稳态导热有限元计算的特点，运用有限元法对隔热部件进行了热强度分析。

The fatigue is analyzed for the SENT specimen of TA6V titanium alloy at different stress ratio and on different stress level by the general finite element analysis software ANSYS. The dangerous fatigue location is predicted by the nodal stress Y-direction of the hemicycle notch for TA6V titanium alloy SENT specimen. Based on the local stress-strain method and the material S-N graph, the nominal stress-strain of the specimen is converted to the local stress-strain of the dangerous location by the elastic and plastic finite element analysis, thus the fatigue life is estimated by Miner fatigue damage accumulation theory and compared with the fatigue test of small crack growth.

借助大型通用有限元分析软件ANSYS对TA6V钛合金SENT试样在不同应力比和不同应力水平下进行疲劳分析，根据SENT试样缺口处的应力状态分布预测疲劳危险部位，采用局部应力应变法，结合材料循环的S-N曲线，通过弹塑性有限元法将构件上的名义应力谱转换成危险部位的局部应力应变谱，从而根据危险部位的局部应力应变历程采用Miner累积损伤理论对构件的疲劳寿命进行估算，并与疲劳小裂纹试验数据进行比较分析。

Based on the three dimensional viscoelastic integral constitutive relation of a propellant grain with the finite element method, the analysis about the thermo-viscoelasticity of solid propulsive agent column is presented.

基于药柱的三维线性热粘弹性积分本构关系，采用有限元法，对固体火箭推进剂药柱进行热粘弹性有限元分析，得出药柱在轴向过载作用下的变形结果和药柱内危险部位的位置，表明药柱具有明显的粘弹性特点。

In slope stability analysis,the limit equilibrium method and finite element method are usually adopted.

边坡稳定分析中常用的方法有极限平衡法和有限元法，而瑞典条分法由于其原理简明、公式简单而成为应用广泛的边坡稳定分析方法之一。

Limit state finite element method ; slope stability analysis ; ultimate bearing capacity of foundations ; tunnel stability

极限分析有限元法；有限元强度折减法：边坡稳定分析：地基极限承载力；隧道稳定性

Based on the conception of the equivalent stress,the expressions of the equivalent stress was educed. In this optimal design, the macro file for calculating the equivalent stress of arch dam is complied by using the parameter design language of the software, and the optimal design for shape of arch dam using equivalent stress as stress restraint condition is carried out.

本文基于等效应力概念，推导了拱坝有限元等效应力计算公式，将有限元法求得的坝体与基岩交接面上的应力合成截面内力，然后求出对应的线性化应力，并以此应力作为应力约束条件，实现了以等效应力作为应力约束条件进行拱坝体形优化。

The method of how to analyze the electromagnetic field of the generator is introduced. And with the help of a kind of FEM software, the parameters of a model machine are calculated and simulated, including the electromagnetic field, no-load voltage, single-side magnetic force, loaded torque and axial force.

其次，对转子带防护罩的高速永磁发电机数学模型进行了推导，介绍了利用有限元法对电机磁场进行分析的方法，并运用有限元软件对一台样机的参数进行了仿真，包括电机磁场分析、空载电压波形、单边磁拉力、负载转矩以及轴向力等方面的内容。

Finite element method is based on numerical calculation with the help of matrix and material mechanics and other knowledge, which is widely used in structural analysis ANSYS is a big finite element software integrated with structure, fluid, electric and magnetic field.

有限元法是借助矩阵、材料力学等知识，在结构分析中得到广泛运用的数值计算方法，ANSYS是融结构、流体、电场、磁场分析于一体的大型有限元分析软件。

And then, according the FEM numerical simulation result, the coefficient value of the modified model is made sure. Moreover, the transform characteristic of section is analyzed, the dynamic change process of rolling-force, stress and strain is reappeared and the variety regulation is analyzed. Through the contrast the variety regulation between the simulation and the spot-line measurement, the conclusion that the datum are matched basically is obtained.

并且，分析了连轧无缝钢管截面的变形特点及轧制力和应力应变的变化规律，重现了轧制力和应力应变的动态变化过程，对比了有限元数值模拟的轧制力与现场实测的轧制力，得到了两者的变化规律基本相符的结论，证实了显式动力学有限元法作为连轧无缝钢管的研究方法的可行性。

As an effective method of numerical computation, FEM is widely applied in numerical simulation of metal deformation process.

有限元法作为一种有效的数值计算方法已经被广泛应用于金属成形过程的数值模拟方面，但是有限元分析软件在使用过程中也存在许多问题，例如数值模拟解的精度问题，直接优化设计技术参数的问题。

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。