支承结构

Emulation result mirrorred pipe rack of steel of angle iron bearing to prevent the basic function that bumps into a structure, the whole time process of collision be able to comprehensive imitate comes true.

仿真结果反映了角钢支承钢管架防撞结构的基本性能，碰撞的整个时间历程得以全面的模拟实现。

Thirdly , in the light of the demands ' that the large - scale photoelectric tracking and sighting equipment now available ask for fsm and the specific demands of the fast - steering mirror , designs a set of shaftless rapid controlling reflector system which impels manufacturing enterprises to bourgeon a suit of new productive processing method which differentiate completely from that of the axiferous fast - steering mirror system

由现有大型光电跟踪、瞄准设备对fsm的要求，结合对快速控制反射镜结构的具体要求，自行设计了一套完全区别于有轴系支承的新的生产加工工艺的柔性轴快速控制反射镜系统。

BZZ heavy cantilever crane is scheduled column cantilever crane extension products, the aircraft using the rotary bearing structure with variable cross-section arm, from the kind of up to 2.5-16 meters radius of gyration of 7-12 meters.

BZZ重型悬臂起重机是定柱式悬臂起重机的延伸产品，该机采用了回转支承与变截面臂结构，起种高达2.5-16米，回转半径达7-12米。

In order to meet the market requirement, the company has paid much more attention to technical innovation and investment in recent years, so that our products have developed from original eight types (0, 2, 3, 4, 6, 7, 8, 9) in early times when the company was established, into multiple series, nearly 100 types of structures and more than 2000 specifications with exterior dimension ranging from 100mm to 1800mm, as well as the self-lubricating joints, inch-size conus, slewing rings and split bearing, etc.

为了满足市场需求，公司加大了技术改造力度和资金投入，一年一大步，一年一个新台阶，由建厂初期生产 0 、 2 、 3 、 4 、 6 、 7 、 8 、 9 八大类型发展到多系列近百种结构外径尺寸为 100mm-1800mm 的 2000 多个规格及自润滑关节、英制圆锥、回转支承、剖分轴承等等。

The train is treated as multi-body system, and its dynamic equations are derived using the D\'Alembert principle. The rail structure is modeled as discrete-supported three-layer system considering the degrees of rail, sleeper and ballast.

车辆为多刚体系统，采用D'Alembert原理建立其动力方程；轨道结构采用考虑钢轨、轨枕、道碴自由度的三层点支承模型；采用有限元法建立桥梁动力分析模型。

The distribution and the variation of the pre-stressed effective quantities in the cross section of the beam are comprehensively analyzed by the FEA along with the variation of the span numbers, span length and linear rigidity ratio of beam to column, wherefore the effect factors and the specific conclusions of lateral restraints on the pre-stressed formation in the concrete beam are drawn.

本文以竖向支承构件有一定侧向刚度的预应力混凝土框架结构为研究对象，分析了框架梁受到柱的侧向约束时的受力机理，并运用有限元数值模拟计算方法全面分析了随着梁柱线刚度比、跨度、跨数等诸多因素的变化，框架梁中预应力有效量的分布和变化情况，得到了侧向约束对框架梁建立预压应力的影响因素和具体结论。

New multi—objectives function (including mill stand longitudinal stiffness, distribution coefficient of loaded pressure between rolls, weight of mill stand, rolling power, rolls loaded gap profile changeability of bending force, transverse mill stand stiffness of bending force, transverse mill stand stiffness of rolling load) multi—constraints (including rolls strength, spindle strength, backup roll bearing load, minimum rollable gauge, roll surface temperature rise) rolls system parameters optimization model of four—high cold strip mill is established, and programme for mill structural illustration creation on the platform of AutoCad designs is compiled. With this as basis, rolls system parameters of Yichang thin strip corporation's 1219 cold mill are calculated using SUMT (subsequent unconstrained minimization technology).

本文建立了以板形和板凸度控制特性为目标的四辊轧机多目标函数（包括轧机纵向刚度、辊间压力分布系数、轧机重量、功率、弯辊力对轧机辊缝形状改变能力、对弯辊力的横向刚度、对轧制力的横向刚度）、多约束条件（包括轧辊强度、接轴强度、支承辊轴承负荷、最小可轧厚度、轧辊温升等）的辊系参数优化模型，以此模型为基础，利用惩罚函数法计算了益昌薄板公司1219冷轧机辊系参数，编制了AutoCAD平台下的轧机结构示意图自动图形软件。

On the basis of these theories, The specific project—the hyperbolic paraboloid shell structure named Shijingshan Gymnasium is introduced, and the finite element model is established, including calculation of load, simplification of node nature and simplification of support.

在这些理论的基础上，引入工程实例——石景山体育馆双曲抛物面网壳结构，建立有限元模型，包括使用荷载的计算、节点性质的简化、支承的简化等。

First ,make up the main parts'structure and the key designing parameters; thus reference to the similar driving axle structure , decide the entire designing project ; fanially check the strength of the axle drive bevel pinion ,bevel gear wheel , the differentional planetary pinion, differential side gear , full-floating axle shaft and the banjo axle housing , and the life expection of carrier bearing .

本文首先确定主要部件的结构型式和主要设计参数；然后参考类似驱动桥的结构，确定出总体设计方案；最后对主，从动锥齿轮，差速器圆锥行星齿轮，半轴齿轮，全浮式半轴和整体式桥壳的强度进行校核以及对支承轴承进行了寿命校核。

Main conclusions of this paper are listed as bellows: First hinge line is not particular in the complete-system, but the close bar on it will generate great stress while the initial stress is imported. So the structural shape has not only great relations with the position set of the hinge line, but also maximum impacts on the deformation of the whole body. Equal to the support part of jacks, the circumference of the fist hinge line will generate the greatest impacts while exchange.

本文研究的主要结论有：第一铰线在完成系中没有特殊之处，但在初期应力导入时，第一铰线上的闭合杆件会产生相当大的应力，因此，结构形状和铰线的位置的设定有很大关系，对结构整体变形也有最大的影响；第一铰线的周边相当于千斤顶的支承部，在替换支撑拆除千斤顶时会产生很大的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。