查询词典 FEM

The mechanism of instability wrinkling in the process based on minimum energy principle is revealed, uniform mathematic description of the wrinkling wave on the strip of in-plane bending is established, the internal and external energy is deduced by energy method, and a uniform criteria of internal and external wrinkling is established; then how to combine the criteria with the FEM simulation system to make the numerical prediction of wrinkling into reality is also resolved in the paper. The effects of the forming parameters on the deforming result are analyzed by the uniform predict criteria. The results show as follows: as the compress width increase, external wrinkling first come into being, then internal winkling do, and finally in-plane bend occur; the loading wedge angle increase, internal winkling first come into being, thenin-plane bend do, and finally external wrinkling occur; in-plane bend is possible to occur with a increase of the strain-hardening exponent and the strength coefficient; and the effect of the friction factor may be ignored.

2揭示了板带不均匀压下面内弯曲成形过程基于能量原理的失稳起皱机理，提出了统一的描述内外缘起皱波形的函数，采用变分法推导了服从该波形函数的内外缘起皱能，建立了统一的起皱预测准则；将新建立的统一的起皱预测准则引入到数值模拟系统IBS中，数值预测结果与实验结果的吻合较好；分析了成形过程各参数对起皱的影响规律：随着接触变形区宽度的逐渐增大，先是发生外缘起皱，然后发生内缘起皱，进而才出现稳定成形；随着实际加载楔角的增大，先是发生内缘起皱，然后发生稳定成形，进而出现外缘起皱；硬化指数和强化系数增大，易于稳定成形；摩擦因子对起皱的影响不明显；而且接触变形区宽度对起皱的影响最大。

Through the establishment of the eight-node hexahedral elements describing continuous variation of the thickness of adjacent elements, the involved nonlinear anisotropic elasto-plastic material model, the control strategies of the dynamic load of trajectories and so on, the FEM model of SPIF was reasonable planed.

通过建立能够描述邻接单元厚度连续变化的八节点六面体实体单元、涉及材料各向异性的非线性弹塑性材料模型、和工具头运动轨迹动态加载的控制策略等数值模拟中的关键性问题，对适用于金属板材单点渐进成形数值模拟分析的有限元模型的建立进行合理规划。

At first FEM is used to calculate the deformation of the right abutment of the Danjiang arch dam; and the influence of the fault F1 on the deformation of the abutment is analyzed emphatically.

用有限元计算了单江拱坝右坝肩岩体的变形，着重分析了断层 F1 对于坝肩岩体变形的影响。

The stress and stability analysis of arch dam and abutment are the main task of traditional arch dam design. Nowadays there are two kinds of analysis method to use. One method is the arch-cantilever load-distribution method, in which the arch dam stress and abutment thrust are calculated, while the stability of abutment is evaluated by rigid body method or other method. The other is FEM method, which evaluates the arch dam stress and stability of abutment at the same time.

作为拱坝常规设计的主要任务—坝身和坝肩的应力和稳定分析，当今大体有两套体系可用：①用拱梁分载法分析坝身应力和坝肩推力，结合刚体法或其他方法进行坝肩稳定审核；②用有限元法对坝身应力和坝肩稳定同时进行审核。

By means of FEM, the stress and strain distribution and the flow direction of the deformed materials in typical planes of this mechanical model are analyzed. The influencing regularities of the main factors, such as rib width, friction coefficient, rib side angle, material characteristics are also discussed.

利用刚塑性有限元方法，对这种简化力学模型典型平面上的应力应变分布以及变形后材料的流动方向等方面进行了深入分析，并对主要因素，如凸筋宽度、摩擦系数、凸筋侧壁角度、材料特性对凸筋高度和形状的影响规律进行了研究。

Mobile phone RF system consists mainly of transceivers, power amplifier and antenna switch. PA might be set in the Front-End-Module or FEM. In 2G, the cost of RF system was only about US $1.5, while In 3G, the cost was increased to between US$6.0 and US$8.0, and the cost will further increased to about US$8.0 to US$10.0 in 4G, obviously, FR system had the highest cost growth during the upgrading of mobile phones.

手机射频系统有三个主要零组件，收发器、功率放大器（Power Amplifier，下简称PA）和天线开关，有时PA包含在前端模块（Front-End-Module，简称FEM）。2G时代的射频系统只占大约1.5美元的成本，3G时代则占大约6-8美元的成本，4G时代则占大约8-10美元的成本，也是手机升级换代成本增加最多的部分。

Key words: Partial Press; Joint Arch Tunnel; FEM; Construct Order

偏压， 连拱，隧道，方案，开挖

Secondly,the space finite element model for main arch ring of Changyang Huanglingdong Bridge is established by general FEM programme ANSYS.

利用ANSYS建立了湖北长阳黄陵洞大桥箱形主拱圈的空间有限元模型，采用应力叠加法和传统方法对裸拱形成过程进行了力学分析。

This paper introduces the structure, especially the technics of armature winding and the way of arrange method of the motor. Based on it, the physical and mathematical model of the armature magnetic field was found. Then making use of the FEM to compute and analyze the armature magnetic field. At last, the influence of the armature magnetic field to the main field is discussed.

本文通过对此种电机结构，尤其是电枢绕组工艺及盘列方式的简单介绍，建立了盘式无铁心永磁同步电机电枢磁场的数学模型和物理模型，并利用有限元数值计算方法对电枢磁场进行计算，分析了此种电机电枢磁场的分布情况以及它对主磁场的影响

Keywords: Injection System Balance, Runner Balance, Gate Balance, FEM, Moldflow

注塑系统平衡，流道平衡，浇口平衡，有限元， Moldflow

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"