计算单元

Results show that digital simulation with the method features rapid model establishment, significant reduction of node and unit numbers, low calculation cost and accurate results. At the same time, defect that the stress distribution on composing plate and reinforced plate of the hoist boom can be reflected in finite element model by this method is pointed out All these provides valuable reference for the design and manufacture of hoist booms.

结果表明：用此方法进行数值模拟，建模速度快，节点及单元数大大减少，节约了计算成本，结果准确；同时指出这种方法建立有限元模型不能反映吊臂组成板和加强板应力分布的缺点，可为吊臂的设计制造提供有价值的参考。

According to practical work condition, section of a three segment hoist boom is self-determined with SECWRITE commands, then a finite element model is directly established in ANSYS environment with ANSYS finite element analysis software. Using Beam44 beam unit and node degree of freedom coupling technique to simulate connecting between each boom section and conduct finite element analysis, calculated result of stress deformation for the boom is obtained. The result from digital simulation is in relative coincidence with theoretical analytic result and the nonlinear decline occurrence in boom bending moment curve is explained.

以ANSYS有限元分析软件为工具，按吊臂实际工况，运用SECWRITE命令自定义三节吊臂截面直接在ANSYS环境下创建有限元模型，使用Beam44梁单元和节点自由度耦合技术模拟各节臂的连接，进行有限元分析，得到吊臂应力变形数值计算结果，数值模拟所得结果与理论解析解相吻合，解释吊臂弯矩图出现非线性下降的原因。

The design of the leads unit, low thermal resistance and high electrical isolation heat intercept connection, stability of HTS current leads, optimum design of conduction cooled current leads is analyzed in detail.

对引线单元的结构设计、引线的导热绝缘冷却结构、稳定性等问题，以及传导冷却的铜电流引线优化设计进行了详细分析和计算。

Under the guide of the theory of dynamic system of entrapment, the main methods applied here are multidisciplinary analysis and comprehensive study. The characteristics of compaction curves, the evolution of organic matter, the direction of migration and assignment, conduit system, fluid potential are studied It is concluded that the low maturity of the source of the Eogene age is the main factor to control the entrapment.

在成藏动力学系统理论指导下，对德南洼陷下第三系进行整体、系统、动态、宏观与微观相结合的原则，分析压实曲线特征、异常孔隙流体压力；研究有机质演化过程、油气运移方向和分配单元、输导体系、构造样式；提取测井、地震资料，计算流体势；运用相干技术和可视化等技术。

The plastic deformation mechanism of the process is explained. The vector equations of the curved conical surface and the figure of the particle motion for the forming process of the bending tube are presented. The theoretical model of stress and strain fields of the forming process is deduced. The practical forming process of tubes of large diameter demonstrates the validity of the new type of design method of the ox-horned core bar and the computation formula of the length of the raw tube.

本文通过研究弯管成形瞬时应力、应变状态及演化过程，阐明了弯管成形过程受力变形特点及力学原理；提出了一种适合弯管变形分析的新单元及数值方法；建立了弯管成形过程应力、应变场&标准图象&；通过研究弯管成形过程金属流动规律及力学条件，阐明了本工艺塑性变形机理；建立了描述弯管成形过程的曲锥面向量方程及其质点运动学图象；推导了弯管成形过程应力、应变场理论模型；结合大口径弯管生产过程，验证了本文给出的新型牛角芯棒设计方法和管坯长度计算公式的正确性。

The main purpose of this article is to work over and analyse dynamic specialties of the plane four bar mechanism especially crank and rocker mechanism and brace cake mechanism in the dynamic and constrained system contained with mechanical and hydraulic integration, and dynamic specialties of the plane four bar mechanism in the system made of mechanical and hydraulic integration can carry out and be easily computed by the software MATLAB to have a simulation.

本文的主要目的是研究分析机械系统和液压系统综合动态约束系统下，对机械系统单元部分选取的平面四连杆机构，尤其是曲柄摇杆机构和曲柄滑块机构的动态特性，并能通过MATLAB软件实现对机液综合机构学理论中的平面四杆机构的动态特性计算及仿真研究。

They explain the interaction between these parameters, and help to the design of active vibration control system of piezoelectric smart cantilever beam. On the above, the optimal model with m pairs of PZT sensor/actuator and state equation are established, and the PZT films position/length and the feedback control gain are optimized with the method of moving asymptotes.

在此基础上，本文进一步研究了同位布置多对压电传感/致动元件的悬臂梁关于压电传感/致动单元对的布置、长度和控制增益的优化设计模型，并利用MMA(the method of moving asymptotes)算法对压电片的位置、尺寸和控制增益进行了优化计算。

This paper outlines the basic physics concepts of TOPMODEL and its program structure, and the program structure of single catchments is drawn.

概述以地形为基础的水文模型的基本原理及模型结构，绘制了单元流域计算流程图。

In this thesis, a simplified two-dimensional implementation of Arch Dam in linear elastics is described.

本文针对拱坝的二维线弹性问题进行求解，计算结果由MATLAB编写的无单元伽辽金法程序运行得出，程序还可以精确求解二维悬臂梁问题。

In the present study, through using non-linear three dimensional finite element analysis, considering the contact in flange to nut and flange to gasket, we accurately computed the stress distribution in the flange joint in the normal work condition.

采用ANSYB软件，应用三维有限元技术，考虑了垫片的非线性和法兰和螺母、垫片的接触问题，并且采用了螺栓预紧单元，准确计算出法兰连接在承受内压、轴向力和弯矩外荷载时的应力分布。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。