有限元法

According to axisymmetric unsteady heat conduction equation of orthogonal aniso tropic material and boundary conditions,the equilibrium equation of a system of finite elements is deduced with triangular element of high accuracy,and programs are designed.

根据均匀正交各向异性材料轴对称热传导方程及其边界条件，利用变分法及欧拉理论，选取 6 节点的高精度三角形单元类型，推导了一般轴对称非定常热传导有限元基本方程。并编制了相应的计算程序。

The penalty function is adopted to impose the essential boundary condition, the tensor product weight function with a rectangular influence domain is chosen, and the finite element background cell is considered as the integration unit.

将无网格再生核质点法用于刚塑性可压缩材料轧制过程的模拟，采用罚函数满足本质边界条件，选用矩形影响域的张量积核函数，利用有限元网格作为积分单元，对求解域内和边界上采用不同的高斯积分方案。

In this paper, three-dimension FEM is applied to study the influence of the surrounding environments by shield-driven.

进行了盾构法施工对周边环境影响的三维有限元数值计算的研究分析。

The alternate iterative method in the nonlinear minimizing process has been presented, on the base of finite element method and the least square method.

摘 要：对混凝土框架结构的局部刚度缺损反问题进行了动力学方法研究，在采用有限元最小二乘法的基础上，提出并利用了非线性最小化过程的交错迭代法。

Based on the engineering structure, three dimensional finite element model is set up by SAP2000N software and its characteristics is calculated by eigenvectors method.

根据实际结构，在软件SAP2 0 0 0N的基础上建立了三维有限元模型，采用特征向量法，得到了该结构的各阶自振频率和模态的理论值。

The results of transient temperature field calculated by finite difference method and ANSYS software agree with the experimental results.

高压氮气淬冷温度场的有限差分法计算结果和ANSYS有限元分析软件计算结果与实测结果吻合较好。

A penalty function method of finite element was proposed for nonlinear contact stiffness of joint.

提出了一种在有限元分析中用罚函数法分析结合部非线性接触刚度的方法。

A penalty function method of finite element was proposed for nonlinear contact stiffness of joint. The stiffness of joint was obtained by experiment.

提出了一种在有限元分析中用罚函数法分析结合部非线性接触刚度的方法。

Finite element method ; influence function method ; mill stiffness

有限元；影响函数法；轧机刚度

A three-dimensional finite element model was set up to validate the reliability of the theoretical method using the software of Abaqus.

为验证该解析法的合理性，采用非线性较强的有限元软件Abaqus建立了空间模型，模型考虑了剪力连接件和材料的非线性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。