FAST缆索吊装系统的性能及选型分析

发布时间：2018-01-21 19:36

本文关键词： 悬链线方程柔性软索缆索吊装系统静力分析抛物线理论　出处：《湖北工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：500m口径球面射电望远镜FAST(five hundred meters aperture spherical telescope)是我国在贵州省建成的国际上口径最大、探测能力最强的单口径射电望远镜。FAST由约4450个反射面单元组成,需由全跨径和辐射式两种吊装系统完成吊运工作,面板安装完毕后,吊运机械将改造成日后工程保养机具,用于FAST反射面后续维护工作。缆索吊装施工方法广泛的应用于许多大型工程建设项目中。为了优化吊装缆索的线型和选型,以及为了保证缆索在作业过程中具有最佳的力学性能和最优的线型截面,需精确计算缆索索力和确定缆索截面面积。本文基于一系列静力学理论和ANSYS有限元软件的分析来确保缆索系统达到最理想的状态:(1)柔性缆索承力体系是以缆索或锁链作为主要承重构件,以塔吊作为支撑,按照不同的结构要求,组合不同功能的配件来达到使用要求。通过研究吊装系统所用的设备及其特点,并通过对比双车索道法,轨道中心法等六种缆索吊装方法,确定了FAST的缆索吊装方案;(2)基于风载和温度应变对FAST结构精度的影响,确定了FAST的缆索吊装系统的工作精度;通过ANSYS有限元软件的分析,找到了悬索在最大工作荷载条件下的最大挠度及缆索的最大应力危险截面;并讨论了缆索在有荷、无荷时的线形动态性能;(3)索道设计理论中常见的是以双曲线函数为主体的悬链线理论和以代数函数为主体的抛物线理论两大理论体系。悬链线函数是超越函数,它所讨论的力学问题可量化为在每一个垂直于线形的力学问题,而抛物线理论的计算是基于平行于线形的力学问题,常以抛物线函数来代替超函数并进行量化研究。论文基于抛物线理论,对辐射式和全跨径缆索吊系统进行了详细的静力分析,得出了两种系统的最大挠度,线型选型及安全工况条件。
[Abstract]:500m aperture spherical radio telescope (five FAST hundred meters Aperture Spherical Telescope) is built in China in Guizhou Province, the largest diameter of international, single detection ability of the strongest diameter radio telescope.FAST consists of about 4450 reflector units required by the full span and the radiation type two lifting system to complete the lifting of the work, the panel is installed after lifting machinery will be transformed into a day after the engineering maintenance equipment for subsequent maintenance work. FAST reflector cable hoisting construction method applied widely in many large-scale construction projects. In order to linear and optimal selection of cable erection, and in order to ensure that the cable has the best mechanical properties and the optimal linear section in the process of operation in the accurate calculation is required for cable force and determine the cable cross-sectional area. This paper analyzes a series of static theory and based on ANSYS finite element software to ensure the cable system The system to achieve the most ideal state: (1) a flexible cable bearing system with cable or chain as the main bearing member in the tower crane as a support, in accordance with the requirements of different structures, different combinations of functional parts to meet the use requirements. Through the study of hoisting system use of equipment and its characteristics, and through the comparison of the two car ropeway method, the track center by six cable hoisting method, the lifting scheme of FAST cable; (2) the influence of wind load and temperature strain of FAST structure based on precision, determine the FAST cable hoisting system's accuracy; through the analysis of the finite element software ANSYS, to find the maximum stress in the dangerous section of suspension the maximum working load under the condition of maximum deflection and cable; cable are discussed on load, linear dynamic performance without load; (3) the cableway design theory in common with hyperbolic function as the main body of the catenary theory and to Algebraic function as the main body of the parabola theory two theory system. The catenary function is beyond the function, it discussed the mechanics problems can be quantified in each perpendicular to the linear mechanics problems, and calculated parabolic theory is parallel to the mechanical problems based on alignment, often with a parabolic function to replace the super function and quantitative research. Based on the parabola theory, carried out a detailed analysis of the static radiation type and full span cable crane system, it is concluded that the maximum deflection of the two systems, line selection and safety conditions.

【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU758;P111.44

【相似文献】