查询词典 finite element method

To make use of finite element method, the field of electromagnetic wave propagating in trapezium tunnel was studied. The attenuation rate and its numerical analysis were deduced on the foundation of tiny-intervene method and the calculating program was also compiled.

应用有限元方法研究了梯形隧道中的波导场问题，并以微扰法为基础推导了波模衰减率的计算公式，编制了计算程序。

The local averaging method is used to discretize the random field, correlated random variables are transformed to a set of uncorrelated normalized random variables, combining viscoelastic stochastic finite element method with H-L algorithm, the reliability of solid propellant grain is studied with different random parameters.

为了讨论各类随机因素对药柱结构可靠性的影响，采用局部平均法离散参数随机场，并通过相关结构分解成归一化的独立随机变量，将可靠度指标算法和粘弹性随机有限元法相结合，进行了固体推进剂药柱的结构可靠性分析。

The numerical method of the variational principle combined with finite element method is presented in the paper.

文中介绍了运用该变分原理并结合有限元方法进行数值计算的方法。

In order to do this, the width of narrow annuli cooling channel of beryllium beam pipe was designed by optimization method, the theoretical analysis and finite element method were used, then the optimal width was chosen, the influence of concentrated heat on the temperature of inner and outer wall was studied, and the optimal working velocity of cooling fluid was given.

本文结合理论分析和有限元数值模拟对束流铍管的冷却环形窄通道尺寸进行优化设计，确定了窄通道最佳间隙，研究了集中热负荷对内外壁温度场的影响，并确定了冷却液最佳工作流速。

In order to analyze the stiffness of 3D 4 directional braided composites, the homogenization theory based on the multi-scale perturbation theory was used as the basic theory. The virtual displacement principle was used to educe the homogenization formulation of effective elastic modulus and the schemes to solve the problem using finite element method. The effective elastic modulus of 3D braided composites were predicted by this method and the calculation results agree quite well with experiment results.

在对三维编织复合材料刚度性能的分析过程中，以基于小参数渐近展开和多尺度摄动方法的均匀化理论为理论基础，用虚位移原理导出了等效弹性模量的均匀化列式及其有限元求解方程，从而通过细观和宏观有限元的数值分析方法预测了三维四向编织复合材料的等效弹性模量，预测结果与实验结果较为吻合。

But the rigid body limit equilibrium method can not reflect the process of progressive instability and mechanical mechanism on failure for rock mass while the nonlinear finite element method is difficult to solve the displacement discontinuity of weak structural plane.

重力坝的深层抗滑稳定分析多采用刚体极限平衡分析方法和非线性有限元法，但通常的刚体极限平衡法不能反映坝基岩体渐近失稳过程和破坏的力学机制，非线性有限元法则难以解决坝基中软弱结构面位移不连续问题。

The weak formulation permit is satisfied not point by point, finite element method balances only at node neighborhood, in unit balance is not required, in analytical method single check from infinite series does not satisfy the equation, but infinite number of points satisfy the equation, and then the weak formulation of dual system of Hamilton equations was educed.

基于基本方程和边界条件的弱形式，给出相应的广义变分和不同形式的有限元所采用的弱条件，说明弱形式允许不是逐点满足，有限元法只在节点邻域平衡，在单元内不要求平衡，解析法用无穷级数中单取一项也不满足方程，也是无穷多项在积分下满足，进而导出对偶体系弱形式哈密尔顿方程。

Frequency method; Measurement of cable forces; Finite element method; Spline fitting; Yamen Bridge; Parameter identification

关键词：频率法，索力测量，有限元法，样条拟合，崖门大桥，参数识别

In this paper,a method for computation of aerostatic stability of long span bridge s,the nonlinear finite element method,is put forward.

提出一种计算大跨径桥梁静风稳定性的方法——非线性有限元法，这种方法基于ANSYS，充分考虑了结构几何非线性及静风荷载非线性的影响。

In order to control the insufficient transition displacement of the long rail components to ensure the high regularity of turnout and its locking reliability, a transition design method for long rail components and double limb elastically bendable turnout frog structure was established using the finite element method, a new roller sliding platform was developed, and the transition traction point layout and stroke design were optimized.

为控制长大轨件转换不足位移，确保道岔的高平顺性和锁闭可靠性，运用有限单元法进行长大轨件及双肢弹性可弯心轨结构的转换设计，研制出新型辊轮滑床台，并优化了转换牵引点布置及其动程设计。

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％。