结构单元

This paper made displacement calculation and analysis adopting beam3, beaml88 units through ansys software, then compared the displacements of upper steel frame of mixed-layer structure and single story workshop under different loads and established the reasonable domain of displacement coefficient about mixed-layer structure, thus provided references and basis for the design of such structure.

针对一种新型结构即混凝土与钢结构混合而成的结构一混层结构，通过ansys软件，采用beam3、beam188单元对此新型结构进行位移计算及分析，并通过在不同荷载工况下混层结构的上层钢架位移与单层厂房的钢架位移进行比较分析，确定混层结构位移影响系数的合理范围，为此类结构的设计提供参考依据。

To study the dynamic response performance of reinforced concrete frame structure with friction energy dissipation braces,the element stiffness and mechanics model of the element of friction energy dissipation device and the element of frame bar are analyzed.

为研究钢筋砼摩擦耗能支撑框架结构的动力反应性能，对其中的摩擦耗能器单元和框架杆单元的单元刚度和力学模型做了分析。

Its benefit is that different structural sizes can be controlled by single design variable, such as the thickness of plate element and the area of bar element can be controlled by single dimensionless design variable.

采用无量纲设计变量为了适合工程实际的设计变量连接，利用无量纲设计变量，其好处是可以跨单元、跨截面的用同一个设计变量控制不同类型的结构尺寸(如板单元的厚度、杆单元的截面面积等)。

The approach of computational simulation is the finite element method.The whole research is combined by the following three parts. In part one, a program on quadtree method is compiled. It can automatically generate planar structures with all-quadrangular, good quality elements in high speed, and it can create data files on information of elements and nodes, which provide the foundation for finite element analysis. In part two, a program on finite element calculation is compiled by object-oriented method, During the simulation of fracture, the displacement and stress are calculated by the program.

本文的工作可分为三大部分：第一部分编制了四叉树法程序，通过它可对平面结构进行单元离散，快速自动生成质量较好的全四边形单元，并获得离散后的单元信息和节点信息，为有限元计算打下基础；第二部分利用面向对象方法编制了有限元计算程序，在破坏模拟过程中，利用它进行位移、应力分析；第三部分对脆性材料的破坏过程进行了模拟。

For some shortcomings of unknown quantity numbers in finite element method, QR-method establishes a transformed relationship between a unit node displacement vector and the entire framework of spline node displacement vector,making the structure of the total stiffness matrix, damping matrix, mass matrix directly superimposed in no need of finite element method in the first expansion after the superposition process. So the method greatly simplifies the calculation process and improves computing speed.

针对有限单元法中未知量数目很多的缺点，QR法建立起单元结点位移向量与整个框架样条结点位移向量的转化关系，使得结构总刚度矩阵、阻尼矩阵、质量矩阵可以直接叠加，不需要有限单元法中先扩张后叠加的手续，大大简化了计算过程，提高计算速度。

In this paper author give a method for managing data by a uniform memory struct and organization method,and give a "seven board theory" which is abreacting unit from different 3D fomat,then reconstruct them in order to sharing and conventing 3D data in different 3D format

本文提出一种组织方法来统一管理内存结构，并在此内存结构的基础上抽象出&七巧板&单元，即把不同格式的基本几何单元抽象出来，再重新组装，完成对各种格式和模型的转换和共享与融合。

To solve the first problem, a mathematical method is proposed to determine whether all of the pivots of a multi-angulated beam are within its corresponding plate.

为了解决第一个问题，本文提出了一种数学的方法来保证所有角梁的剪式铰节点都位于相应的板单元之下，并且不管板单元的边界是什么形状，这种方法还可以被拓展到对称结构和非对称结构当中。

The organic molecules with it-conjugated structure are ideal structural units for molecular wires. The asymmetric electronic structure of the molecular junctions is the basic reason for molecular rectification. Rotaxanes and catenanes are ideal structural units for molecular switches. The operation principle of molecular field effect transistors is quantum tunneling, the metal/insulator/mental tunneling is mainly.

具有π-共轭结构的有机分子体系是构造分子导线的理想单元；分子结的电子结构不对称性是分子具有整流特性的根本原因；轮烷和索烃是构造分子开关的理想单元之一；分子场效应晶体管的工作原理是量子隧穿，主要是金属－绝缘体－金属间的隧穿效应。

In order to find the applying area of cellular element method, it was used to analyses the structures besides truss, beam and plane problem.

为探讨元胞单元法的广泛适用性，论文将元胞单元法的应用领域从杆系结构、平面问题拓展到其它结构。

In order to find the applying area of cellular element method, it was used toanalyses the structures besides truss, beam and plane problem.

为探讨元胞单元法的广泛适用性，论文将元胞单元法的应用领域从杆系结构、平面问题拓展到其它结构。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。