大型结构物液压托举滚轴移位技术研究

发布时间：2018-05-07 05:02

本文选题：大型结构物 + 液压托举　；参考：《天津大学》2012年硕士论文

【摘要】：随着改革开放发展,我国各项事业蓬勃腾飞,各种建筑物等大型结构物朝着高、大、重方向发展的趋势已是必然。由于种种原因,如异地建造,现场组装,或城市规划等工程项目要求,有些结构物建好后需要进行移位,这就涉及到大型结构物的移位技术。目前,根据结构物的形式不同,移位方式也不同,主要有吊装移位、滑动移位、小车移位以及本文中提及的滚轴移位等几种不同的方式。吊装方式重量有限,适用于中小型结构物,滑动移位需要牵引机构提供满足结构物滑行的较大牵引力,并且需要在滑道上进行,小车移位方式在国内应用还十分有限。对于滚轴移位,国内外应用此项技术实现大型建筑物的移位已经很成熟,但液压托举滚轴移位技术研究还很少。因此,本文以大型结构物液压托举滚轴移位技术为研究对象,主要研究内容有: 1.应用赫兹接触理论,分析了基于弹性滞后的滚轴滚动摩擦系数理论计算方法,得出了滚动摩擦系数的理论计算公式,并根据滚轴移位实验测得的数据与理论计算数据进行对比分析; 2.应用有限元分析软件ANSYS对滚轴、滚道进行接触建模,对“荔湾3-1”30000t导管架滚轴移位过程中连续垫墩以及滚轴受力情况进行计算,分析了不同工况下的应力和变形; 3.对液压托举滚轴移位实现过程进行分析,利用PID控制技术,对托举过程中各顶升缸受力进行动态调节,应用PLC对压力、位移等测量信号进行判断,通过上位机监控,对电磁阀发出控制指令,实现滚轴移位时各托举点顶升液压缸受力均匀平稳可控; 4.为验证液压托举滚轴移位技术的优越性与可行性,设计了集机、电、液压一体化的滚轴移位实验台,通过对多工况、多配重箱情况下采集到的实验数据进行分析,得出千斤顶/桩腿重量、位移变化曲线图,并进行对比分析。综上,本文提出的大型结构物液压托举滚轴移位技术有重要的工程实践意义。
[Abstract]:With the development of reform and opening up, the development trend of large structures such as buildings is inevitable. For a variety of reasons, such as the construction of different places, site assembly, or urban planning and other engineering projects, some structures need to be displaced after construction, which involves the displacement technology of large structures. At present, according to the form of the structure, the displacement mode is different, including hoisting displacement, sliding displacement, trolley displacement and roller shift mentioned in this paper. The lifting mode is limited in weight and suitable for small and medium-sized structures. The sliding displacement requires the traction mechanism to provide a large traction to meet the structure glide, and it needs to be carried out on the slipway. The application of the small car shift mode in China is very limited. It is very mature to use this technology to realize the displacement of large buildings at home and abroad, but the research of hydraulic lift roller shift is still few. Therefore, this paper takes the displacement technology of hydraulic lifting roller of large structure as the research object, the main research contents are as follows: 1. Based on Hertz contact theory, the theoretical calculation method of rolling friction coefficient of roller shaft based on elastic lag is analyzed, and the theoretical formula of rolling friction coefficient is obtained. And according to the rolling axis shift experiment measured data and theoretical calculation data to carry on the contrast analysis; 2. The contact modeling of roller and raceway was carried out by using finite element analysis software ANSYS, and the stress of continuous cushion pier and rolling shaft during the shift of "Liwan 3-1" 30000t jacket was calculated, and the stress and deformation under different working conditions were analyzed. 3. This paper analyzes the realization process of hydraulic lifting roller shift, uses PID control technology to dynamically adjust the force of each lifting cylinder during the lifting process, uses PLC to judge the measuring signals such as pressure and displacement, and monitors by the upper computer. The solenoid valve is given the control instruction to realize the force uniform and controllable of the lifting hydraulic cylinder at each lifting point when the roller shift; 4. In order to verify the superiority and feasibility of the hydraulic lifting roller shift technology, a rolling shaft shift experimental platform with the integration of collector, electric and hydraulic is designed. The experimental data collected under the condition of multiple working conditions and multi-load boxes are analyzed. The curves of weight and displacement of Jack / pile leg are obtained and compared. In summary, the hydraulic lifting roller shift technology proposed in this paper has important engineering significance.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.2

【参考文献】