50米机动升降杆设计与力学分析

【作者】 陈亚峰；

【导师】 何勇； 袁海平；

【作者基本信息】 南京理工大学 ， 机械工程， 2008， 硕士

【摘要】 某升降塔是中国电子科技集团公司第十四研究所研制的我国首部高机动、高架升降装置。本文首先对该升降塔系统的结构方案进行研究,实现了最大升降高度为50米的多级液压升降结构,该升降塔可以使雷达天线在很短的时间内到达50米之内的任意高度。该升降装置要求能实现自动升降,自动锁紧,自动倒伏,具备完备的安全保护系统。升降塔结构侧向作用的风荷载将对结构产生最为不利的影响,它们作用在结构上是水平力,使得结构在水平方向上产生很大的位移,有可能使得结构失稳。本文对作用于该移动升降塔上的风荷载及对该结构产生的影响进行了研究,通过风洞试验确立结构的体型系数,再通过高耸结构拟静力方法计算得到风载荷。本文针对升降塔系统结构建立了有限元计算模型,利用有限元软件一ANSYS进行了强度和刚度分析,得到在各种工况下的变形趋势及应力情况,提供了大量的计算数据,为设计提供了可靠的支撑。同时对薄壁件屈曲问题进行了理论上的研究,用有限元软件对升降塔在特定的工作载荷下进行屈曲稳定性数值模拟,得出结构设计参数对升降塔稳定性的影响情况,从而对升降塔的结构提供了有效的改进措施。更多还原

【Abstract】 The Telescopic tower is China Electronics Technology Group Corporation The 14^th Research Institute develop of the domestic first mobile lift equip. first, This text research to the structure project that should Telescopic tower system carry out biggest ascend height as 50 meters of fluid drive, The tower can take the radar antenna arrive random place of 50 meters in very short time .The Telescopic equip can carry out automatic ascend and descend, automatic lock tight, lodge automatically, have complete of safety protection system.The Wind of the Telescopic tower side produce the most disadvantageous to the structure, Their function is the horizontal force on the structure, The structure is bring a big displacement, possibly The structure is making Buckling. This text in research to the wind load which carry on the Telescopic tower and the influence which carry on the tower structure. In this paper shape coefficient of the type tower structure is got from the wind tunnel experiments ,Wind load that on the towering structure is computed through a method which simulate the static load.The text contrapose to the Telescopic tower system structure to build a finite element model, ANSYS software is making use to analyze strength and stiffness, The distortion trend and stress circumstance under various condition is Provided, And a great deal of calculation data. The data provide to support for the design. In the time study the buckling theory of sheet metal, Using a finite element software to analyze the buckling stability about the tower in the particular condition by numeric emulation, Getting the structure parameter to influence of the tower stability ,And some improvement is provided about the tower.更多还原