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The relation between deformation and displacement,the equilibrium equation and the princi pie of virtual displacement for straight bar s in plane banding is derived.

本文推导出直杆平面弯曲时的变形与位移关系式、平衡方程和虚位移原理。

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。

In the sense of Von Karman large displacement, the governing equation of nonlinear dynamic response of the clamped circular plates under impact of a mass is established by using the virtual displacement principle and Galerkin's method in this paper. The effect of coupling between the impact load and the displacement of. the circular plates is considered. The governing equation is solved by applying the time increment method and the singular perturbation theory, and the asymptotic solutions of nonlinear dyna...

本文在Von Kármán大位移的意义上，利用虚位移原理伽辽金方法建立了圆板在物体撞击下的非线性动力响应的控制微分方程，在研究响应问题时，考虑了冲击载荷与圆板位移响应之间的耦合影响，文中使用时间增量法和奇异摄动理论求解问题的控制方程，获得了固支圆板非线性动力响应的近似解，并且求解了具体算例，绘出了圆板位移、应力响应曲线以及冲击力随时间的变化曲线。

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。

Blur images, virtual focus and sloped horizon make people difficult to recall the Paris they were familiar with.

模糊的影像、虚焦的主体和倾侧的地平线，一时很难让人想起那个大家熟悉而向往的巴黎。

Friends use Windows, a lot of people know this thing virtual memory.

使用 Windows 的朋友，很多人都知道虚似内存这个东西。

He takes much account of "empty" that is the source of universe, seeming to be visional.

他重视那个"虚"字，那个看似虚幻的天地源头。

The company has built the relationship of long-term cooperation with VM suppliers.

与中国最大的域名，虚机提供商建成了长期合作关系。

There is no life in the void.

在虚空中，没有生命。

B. Wu, and Eman,"Volumetric Accuracy Analysis as Applied to Robotic System," Master thesis, Mechanical Engineering, University of Wisconsin-Maidso, 1986

张英进，"五自由度XYZA-C虚轴工具机之特性分析暨其模糊PID控制器设计研究，"国立成功大学制造工程研究所硕士论文，台南， 2001。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！