虚位移原理

Virtual displacement principle of the analysis statics was used to establish static-equilibrium equations, which was used in calculating driving forces and torques when the mechanism was at some static-equilibrium state.

采用分析静力学的虚位移原理建立静力平衡方程，并用该方程计算了机构处于某种静力平衡状态下的平衡驱动力及力矩。

Based on the virtual displacement principle of finite element method, a weak variation of GAO-YONG turbulence equations is put forward. The subroutine of the element and the integrated finite element code are generated by the finite element program generator successfully.

基于有限元方法中的虚位移原理，写出了不可压流Gao-Yong湍流方程组弱形式的微分方程表达式，利用有限元程序自动生成系统得到了全部有限元计算程序。

The mathematical model of coal-bed methane seepage is established considering slipped effect, giving the weak form of the differential equation based on the principle of virtual displacement, hereby writing FEPG program. Using FEPG system's all the source program of the finite element which considers the mathematical model of coal-bed methane seepage of slip effect the numerical solution is sought.

建立考虑滑脱效应的煤层气渗流数学模型，给出了基于虚位移原理的微分方程的弱形式，据此编写了FEPG程序，利用FEPG系统生成了考虑滑脱效应的煤层气渗流数学模型有限元问题的全部Fortran源程序，并进行了数值求解。

3 Computation of virtual work principle and structural displacement : understand the content about the virtual work principle of deformable body and its application; skillfully master the calculation method of statically determinate structure displacement by loads; master the calculation method statically determinate structure displacement by temperature variation and support movement; know Reciprocal theorems .

虚功原理和结构位移计算：理解变形体虚功原理的内容及其应用，熟练掌握在荷载作用下静定结构位移的计算方法，掌握静定结构在温度变化，支座移动影响下位移的计算方法，了解互等定理。

First, the inertia map in the work space is estimated by the use of virtual work principle and matrix singular value theory.

针对这类机构的结构特点，利用虚位移原理和矩阵奇异值理论，估算出主动关节负载惯量随位形变化的规律。

Starting from the weak form of virtual displacement equation, the homogenization method is introduced for linear elastic problems.

在线弹性范围内，根据均匀化理论，基于虚位移原理，结合有限元方法推导出二维周期性结构的均匀化的有限元格式。

The function of the nonlinear suspension stiffness with tire skipping distance was obtained by virtual displacement theory.

根据虚位移原理计算得到了扭杆弹簧双横臂悬架的非线性悬架刚度与车轮跳动的函数关系。

The principle of the minimum potential energy Because the virtual displacement is very small, the value and the direction of the external forces can be regarded as invariable during the virtual displacement, and only its acting points are changed.

三 极小势能原理由于虚位移是微小的，因此在虚位移的过程中，外力的大小和方向可以当做保持不便，只是作用点有了改变。

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。

During example analysis process, theoretical assembly model of microminiaturized circular shaft and sleeve is established, and stress-strain relationship with different parameters is deduced by virtual displacement principle; two finite element assembly models of D shaped shaft and gear, circular shaft and sleeve are established.

在实例分析过程中，建立了微小型圆轴和套装配的理论模型，通过虚位移原理得出装配过程中不同参数值下的应力应变关系；建立了圆轴与套装配、D型轴与齿轮装配的有限元模型，验证了数字化微装配中虚拟检测技术的正确性、必要性和重要性。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。