有限元法

The research in this paper intends to combine homogenization method with finite element method, and to predict effective parameters and micromechanics of nonwoven C/C composites in microcosms. Some useful results acquired will afford instructions for optimal design of these composites.

本文运用近年来倍受关注的均匀化理论，结合有限元法，对非编织C／C复合材料的宏观等效性能进行了数值预报，对细观结构应力进行了数值模拟与分析，得到了一些对该材料优化设计具有一定指导意义的结果。

Shallow lakes ; wind driven current ; numerical simulation ; upwinding finite element method ; Taihu Lake

浅水湖泊；风生流；数值模型；迎风有限元法；太湖

To avoid this, upwind finite element methods based on streamline upwinding and streamline upwinding petrov-galerkin schemes are developed to solve multidimensional radiative heat transfer in semitransparent media.

为消除解的非物理振荡，该文发展了基于流线迎风格式及彼得罗夫一迦辽金流线格式的有限元法来求解半透明介质的多维辐射传输问题，并对2种迎风格式求解辐射传递方程的性能进行了比较。

S: temperature effect ; trackways ; dynamic characteristics ; finite element methods

温度影响；轨道；动力特性；有限元法

The first part gives a general description of the basic thinkings of the finite element method and wavelet analysis.

第一部分对有限元法和小波分析的基本思想及目前的应用状况做了概括叙述。

Three-dimensional finite element method was developed to predict the acoustic attenuation performance of perforated tube dissipative silencers.

将有限元法应用于预测穿孔管阻性消声器的声学性能。

The influence of the parameters, including thickness of sheathings. studs spacing and screws spacing on the bearing capacity of studs was analyzed by FEM.

采用有限元法分析了墙板厚度、柱间距、螺钉间距等参数对墙架柱承载力的影响。

The influence of strength and thermal expansion coefficient mis-matching between the weld metal and the parent metal on the distribution of welding residual stresses was simulated by using the method of thermal elasto-plastic finite element analysis in this paper.

摘要］ 采用有限元法对相同温度场的焊缝与母材强度和线膨胀系数匹配影响焊接残余应力的规律进行了数值模拟。

Poppet valve ; Finite element method ; Mathematical model ; Flow function

锥阀；有限元法；数学模型；流函数

Hydraulic poppet valve ; Flow field ; Finite element method ; Velocity ; Streamline

液压锥阀；流场；有限元法；速度；流线

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％。