有限元法

This approach is based on the equilibrium principle and combines the finite element method and the stream tracing algorithm.

根据内力路径的定义，推导了一种基于平衡原理、结合有限元法和流线追踪算法确定弹性结构可视化内力路径的算法。

The finite element method is the main method of tunnel excavating.

有限元法是计算隧道开挖的重要方法。

The bending problems of composite shells of revolution subject to various loading condition are solved by the finite element method and Fourier series expansion in this paper.

本文用有限元法和Fourier级数展开技术求解复合材料回转壳体在各种荷载作用下的弯曲问题。

By doing so, the application of SDTFM is extended to random geometrical plane region. Compared with FEM, the method has such the advantages as using fewer elements, faster convergence and highter accuracy of computation especially in dealing with high gradient stress.

与单纯用有限元法求解相比较，本文方法具有划分单元少、求解速度快、计算精度高等优点，特别在求解高梯度应力时，显示极大的优势。

In the first of this paper, by the partial differential equations of heat exchange and finite element method, the mathematical causes which result in calculative errors of temperature fields as different initial temperature on the joint face of concrete construction was analyzed.

本文首先从热传导的偏微分方程和有限元法入手，分析了分期浇筑混凝土结合面上节点初始温度取值不同时，造成温度场计算结果偏差的数学原因。

The nonlinear finite element method is used to calculate the stress and deformation of CFCRD's dam body and faceplate.

采用非线性有限元法计算了胶凝面板堆石坝典型断面坝体和面板的应力与位移。

With the high development of computer technology, FEM gets broadly applied in the engineering.

随着计算机的飞速发展，有限元法在工程计算领域得到了广泛的应用。

The transverse elasto plastic mechanical properties of fiber bundle reinforced composites were studied by using the micro mechanical model and finite element method.

利用细观力学模型和有限元法研究纤维束复合材料的横向弹塑性力学性能。

The rolling procedure of cross wedge rolling in the case of die void and not was simulated adopting Finite element method. Base on it, effect of die void on rolling force was analyzed in detail.

为此，采用有限元法对楔横轧模具在不脱空和脱空情况下进行了轧制过程数值模拟，详细分析了模具脱空对轧制力影响的规律，得到了在一定断面收缩率范围内模具脱空有利于减小轧制力的研究结果，并与测试结果进行比较。

The theory and the implementation of the genetic algorithms are discussed in detail. The question on how to choose the crossover probability, the mutation probability, the scale of population and the numbers of the generation is discussed. Then, the mathematics model of the optimal design is established. Exerting the finite element of elastic base beam and using FORTRAN to write the GAFORTRAN program. The program includes the common genetic algorithms and the modified genetic algorithms.

详细介绍了遗传算法的理论和实现技术，探讨了交叉概率、变异概率、群体规模、进化代数等变量的选取问题，建立起了基于遗传算法的深基坑支护结构设计的优化模型，结合弹性地基梁有限元法，利用FORTRAN语言编制了GAFORTRAN优化程序，程序中包括普通遗传算法和改进遗传算法。

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％。