The working principle and composition of construction of suspension conveyor in aluminum corporation of china ltd , qinghai branch , carbon plant , are introduced , and the questions resulted from production are analysed 摘要就中国铝业公司青海分公司炭素厂组装车间悬链输送机的工作原理及结构组成进行介绍，并就生产中存在的问题进行分析。
In this paper , two kinds of the aforesaid methods based on the parabola and catenary theories for the datum strand erection of the self - anchored suspension bridge of pingsheng bridge in foshan under non - datum state condition of erection are presented 介绍基于抛物线理论和基于悬链线理论的平胜大桥基准索股非基准状态下架设垂度修正量的确定方法及达到该垂度的施工控制方法。
Bezier , b - spline , and their rational models play an important role in cad / cam systems . but these models show obvious shortcomings , such as no encompassing transcendent ( i . e . , nonalgebraic ) curves , e . g . the circle , the cycloid , the catenary and the hyperbolic helix B zier ， b -样条以及它们的有理模型在cad cam系统中有着非常重要的地位，但是这些模型也有着明显的缺陷，譬如不能精确表示很多非代数曲线，如圆弧，摆线，悬链线，双曲螺线等
The main contents about calculation of cable curve for suspension bridges are as follows : firstly , parabola theory , a traditional calculation theory of linetype for suspension bridge , is introduced . according to behavior of suspension bridge , segmental catenary theory which is an exact calculation theory of cable curve for suspension bridges is then built . after that , the errors and adaptable range of segmental parabola theory , segmental straight - line theory and traditional parabola theory are compared one another 悬索桥线形计算部分的主要内容如下：首先，介绍了悬索桥的传统线形计算理论? ?抛物线理论；根据悬索桥的特征，建立了悬索桥主缆线形计算的精确理论? ?分段悬链线理论；并由此比较了分段抛物线法、分段直线法及传统抛物线理论的误差和适用范围；分析了索长变化、跨度变化及主缆变形引起的恒载重分布对主缆线形的影响。
Secondly , calculation theory of construction for suspension bridge is presented under the ideal condition of dead load design . linetype change stiffness of cable and slip stiffness of supporting points are deduced based on segmental catenary theory . then numerical analysis method through sgkz2000 software are introduced in detail about calculating design linetype for suspension bridge , unstressed length of cable , erection linetype of cable and pre - displacement of saddle without loads , erection linetype of wire strands , the fixed position for erecting cable band and linetype of lifting stiffening girders 其次，根据悬索桥恒载设计理想状态建立了悬索桥施工计算原理；以分段悬链线索理论为基础，推导了悬索的线形变化刚度和悬索支点的滑移刚度；介绍了悬索桥成桥设计线形计算、吊索无应力长度计算、空缆线形与预偏量计算、丝股架设线形计算、索夹安装位置计算和加劲梁吊装线形计算的具体方法、数值算法及软件sgkz2000的计算模块的实现。
Based on the virtual work increment equation of updated lagrangian formulation , tangent stiffness matrix of spatial beam / truss element is obtained . according to base assumptions and catenary equation of cable , the iterative formulations of tangent stiffness matrix and nodal force of the spatial two - node catenary cable element are put forward . therefore the entire geometrical non - linear finite element theory for the analysis of suspension bridges is established 本文的研究工作和取得的主要成果有: 1 .将大旋转小应变空间梁(杆)单元与两节点空间悬链线索单元结合起来,形成了一套完整的适合于悬索桥结构分析的几何非线性有限元计算方法。
In this paper , the fundamentals of cable forces by frequency method are introduced . the curve fitting method is utilized to get the correcting formula of cable forces and frequency through the experiment . on the other hand , a kind of catenary line cable element is introduced in this paper , owing to the inaccuracy caused by correcting struss element in fem 本文还介绍了频率法测索力的基本原理，并通过试验，利用曲线拟合法得出索力频率之间的修正关系式；其次，由于有限元计算中，索元所采用的修正杆元所带来的不精确性，对于长索其精度更难保证，因此，本文介绍了一种计算精度高、工作量小的悬链线索元。
