力学

It is well known that elastic deformations are characterized by complete recovery to the undeformed configuration upon removal of the applied loads.

塑性力学是固体力学的重要分支之一，着重于论述与非弹性不可逆变形相关的基本概念和原理，在结构非线性变形分析，压力加工等工程技术中有着广泛的应用。

In the chapter 2, based on elastic mechanics and variation principle, the fundamental and process of static and dynamic FEM is presented, placing special emphasis on the modal superposition method.

第二章根据弹性力学和变分原理，系统总结了有限元法求解静力学、动力学问题(包括特征值、动力响应问题等)的基本原理和步骤，并重点对模态叠加法求解动力，响应问题作了阐述。

The method of vector mechanics is mainly to analyze of the forced state of a mechanical system,to work out the vector equation, and then find the solution.

矢量力学方法主要是对力学体系进行受力分析，列出矢量式计算求解。

Deduct the formula of compressibility of vug with mechanics of materials and elasticity.

应用弹性力学和材料力学的理论，得到了溶洞压缩系数的计算公式

The main contents of this paper is used in college to learn the theory of the mechanics, control theory, mechanical design and computer programming technology, and mechanical theory to simulation, including through the establishment of two parts, kinematics and dynamics of the theoretical models (including Straight leg with the knee model and the model), the use of simulation software to achieve the whole process of Walkabout sports simulation, and to study the mass center position, slope angle and other parameters of walking gait characteristics of the device, and to find the law of passive walking, in order to further less energy-consuming research to lay the foundation of the robot.

本文的主要内容就是运用在大学期间所学到的理论力学、控制理论、机械设计以及计算机编程技术，进行理论推导和力学仿真，通过建立包括运动学和动力学两部分的理论模型的（包括直腿模型和带膝关节模型），利用仿真软件实现行走器整个过程的运动仿真，并研究质心位置、斜面倾角等参数对行走器步态特征的影响，从而找出被动行走的规律，为进一步研究耗能少的机器人奠定基础。这一段翻译成英文拜托别用在线翻译那种很多都是错的

By using wave mechanics , the process of impact driving pile is analyzed,and a mechanics mode of impact driving system which consists of hammer spring cup and pile is established.

应用波动力学分析了冲击沉桩过程，建立了由冲锤、桩帽和桩组成的冲击沉桩系统的力学模型，研究了冲锤重量、桩帽刚度和桩波阻抗对效率的影响，在此基础上，提出了冲锤、桩帽和桩的最佳方案。

By the analysis of wave mechanics of typical percussive drilling system of rock, characteristic parameter a, which describes wave dynamics and structure of the percussive drill system, has been presented.

通过对冲击凿岩典型系统的波动力学分析，提出了反映冲击凿岩机具波动力学和结构特征的参数α，继而确定冲击凿岩机具的动力学特征参数α和运动学特征参数τ，实现了活塞弹性动力学与刚体运动学的融合，为冲击凿岩机具的概念设计提供了较完整的方法。

Through analysis by DSC, wide-angle X-ray diffraction and mechanical properties, the effect of thermal treatment on the fiber was discussed.

通过DSC、广角X衍射及力学性能分析，探讨热处理对成型纤维力学性能的作用。

The mechanics properties of carbon fiber and the comparison between the two kiwis of paper which consisted of wood fiber and ES fiber respectively were investigated in this paper.

研究碳纤维纸的力学性能，并对比不同配抄纤维所成纸页的力学性能。

In the paper ,microstructure evolutions, mechanical properties, small pox phenomenon on the surface, and corrosion mechanism of die-cast magnesium alloy AZ91D,have been investigated and discussed in detail by means of metallography, SEM, tensile strength testing and salt spraying test combined with computer-aided flow in die analysis, some important conclusions are got and listed in the following1 Structure of the die-cast magnesium alloy AZ91D is composed of global-like structure, which is fine and homogeneous, and actinomorphous dendritic grains.

本课题针对AZ91D压铸镁合金，通过金相分析、SEM分析、力学性能测试和盐雾实验，并结合计算机辅助模流分析，对薄壁镁合金压铸件3C产品的显微组织演化，力学性能，爆痘现象和腐蚀机理等进行了较为细致的研究和讨论，得到如下重要结论。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。