查询词典 fem.

The calculation results show that the temperature of the valve cone changes periodically, leading to thermal stress changes periodically, which is the main reason of the valve cone pit corrosion; the operating temperature of the valve can be reduced by using the higher thermal conductivity materials; at the Same time, 3-D FEM provides a good theoretical basis in the process of the design and improvement for the parts of ICE.

计算结果表明：气门锥面处周期性的温度变化，会导致周期性变化的热应力，是导致气门锥面疲劳点蚀的主要原因；采用较高导热系数的材料可降低气门的工作温度；同时，三维有限元法能为内燃机零部件的进一步设计改进提供很好的理论依据。

After verification of FEM, 45 species of 15 series are computed. The major parameters including slippage coefficients, pretensions forces, dimensions of angles, arrangement of bolts, connection method among angle, beam web, column flange, and so on are studied. Some important conclusions are drawn.

主要研究了摩擦系数、螺栓预拉力、螺栓线到与柱连接角钢肢背的距离、螺栓直径及级别、梁长、螺栓排列布置、梁高、柱翼缘厚度、角钢厚度、角钢长度、梁腹板只与角钢肢尖相焊接、钢材强度、角钢与梁柱均栓接、角钢与柱焊接与梁栓接、角钢与梁柱均焊接等参数对腹板双角钢梁柱连接滞回性能的影响，得出了一系列重要的结论。

Firstly edge detection method for cross-sections is expatiated, and a B-spline active contour based on adaptive FEM is proposed to fit the digital contour curve.

首先对断层图像的边缘提取方法进行了论述，针对得到的截面轮廓数字曲线，提出了一种基于自适应B样条主动轮廓拟合方法。

It is considered that the experimental results coincide with the simulating results.The simplified graded inertia anode model is provided from the improvement of the first 2-D graded model. This model is made of cup-shape section, core bar and plugging compound. ANSYS FEM software is used to compute the distribution of the thermal stress in the model.

针对第一种二维梯度阳极模型存在的缺陷进行改进，设计了一种简化的梯度阳极模型，整个模型由外部杯状结构(NiFe_2O_4+Ni)、芯杆(1Cr12WMoV合金钢)、中间填充层(NiFe_2O_4+Cu)三部分组成，由于这三部分的热膨胀系数、弹性模量等物性参数是呈梯度缓慢过渡的，因此可以把这个模型看成是广义的梯度模型。

High-speed precision press; crank and slider mechanism; combined frame; simulation analysis; FEM; modal analysis

论文导师朱思洪，论文学位硕士，论文专业机械设计及理论

According to the velocity filed mentioned above, the contour of the drawing die was rationally designed. To prove its applicability and superiority, FEM software, MARC and SUPERFORM, were used to simulate the drawing process of cross tube in "conical die" and "streamlined die".

本文以十字形钢管为研究对象，开展对异型钢管拉拔成形过程研究，首先结合挤压流线理论，设计了&流线型&拉拔速度场模型，这为改善金属流动状态、降低能耗创造了良好条件；紧接着以&流线型&速度场为理论依据，对十字形管拉拔模具的凹模轮廓进行了合理设计。

By using 3D-FEM, the causes of cracks of the dam body and asymmetric deformations are analyzed. On the basis of these analyses, the reinforcement measures like consolidation grouting, curtain grouting and thickening dam body are put forward.

5根据三维有限元方法系统地分析了长沙坝水库砌石拱坝的坝体开裂及不对称变形的成因，并以此为依据提出了进行固结灌浆、帷幕灌浆以及加厚坝体的加固方案。

During the investigations, some basic research methods and theories such as mending the end section profile of the screw arbor gear applying the conjugate principle, the milling outline for the screw arbor profile cutter by kineto-synthesis method, establishing the dummy variable model of the screw arbor by the CAD method, the theory of the distributing of the fluid pressure on the screw, the precision analyzing and computing screw profile by the dummy model and FEM method are established.

在研究过程中确立了一些基本的研究方法和基本的理论。如应用共轭原理改进螺杆端截面齿曲线的、利用运动合成的方法研究螺杆成形铣刀廓型、应用计算机辅助设计的方法建立螺杆的虚拟模型、应用牛顿流体理论研究螺杆中的流体压力分布、应用有限元分析计算方法对螺杆做精确分析计算。

Although these parameters can be gained through solving sinusoidal electromagnetic field by FEM, the conversion of end resistance and reactance of damper winding is a tough problem.

当然应用似稳场的有限元分析也是可以确定出这种电机的瞬态和超瞬态电抗以及相应的时间常数。

In order to investigate the superplasticity of ceramic matrix laminated composite , the superplastic deep-drawing process was simulated by FEM.

为研究陶瓷基层状复合材料的超塑性能，对其超塑拉深成形过程进行了有限元模拟。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。