摇臂抱杆承载规律和风振响应研究

发布时间：2018-04-23 05:39

本文选题：摇臂抱杆 + 静力分析　；参考：《合肥工业大学》2012年硕士论文

【摘要】：摇臂抱杆是一种特种起重机械，广泛应用于电力行业。四川合江一桥的施工首次引入抱杆，用于扣塔的组立。由于抱杆的安全性要求很高，在设计制造和投入使用前，，进行深入的力学分析研究就显得尤为重要。运用ANSYS软件建立180m高落地式摇臂抱杆的三维模型。首先，研究摇臂抱杆在不同工况下的整体位移变化规律及其杆件的应力分布规律；然后，研究抱杆的主材、横材和斜材在不同工况下的承载规律；最后，研究内拉线、腰环和锚固绳在不同工况下的受力规律。分析结果表明：在大风工况下，摇臂抱杆整体位移较大；摇臂根部和下套件连接处，应力较大，存在应力集中现象；摇臂抱杆主体结构主材轴力一般较大，斜材轴力相对较小；各层腰环拉力从下至上逐渐增大，吊重对侧的内拉线和锚固绳的拉力都较大。研究了20m长摇臂在脉动风荷载作用下的顺风向风振响应。采用MATLAB语言模拟长摇臂在最高工作高度处的脉动风荷载，结合APDL技术将脉动风荷载时程曲线导入ANSYS中并施加于结构，采用Newmark-β法求解。风振响应分析结果表明：长摇臂外伸端部的20981节点风振响应明显，最大位移响应为0.493562m，最大加速度响应为0.233967m/s2，分析结果对扣塔组立施工方案的制定具有指导作用。通过对摇臂抱杆承载规律和风振响应的研究，得到的结论可以为同类工程的设计与施工提供参考。
[Abstract]:Rocker arm pole is a kind of special lifting machinery, which is widely used in electric power industry. The construction of the first bridge in Hejiang, Sichuan Province, was the first time to introduce a pole, which was used to set up the tower. Because of the high safety requirement of the pole, it is very important to carry out deep mechanical analysis and research before designing, manufacturing and putting into use. A three-dimensional model of 180 m high floor rocker arm pole is established by using ANSYS software. Firstly, the law of the whole displacement and the stress distribution of the rocker arm under different working conditions are studied. Then, the bearing law of the main material, the transverse material and the oblique material under different working conditions are studied. Finally, the internal drawing line is studied. The force law of waist ring and anchor rope under different working conditions. The results show that, under the condition of high wind, the whole displacement of rocker arm pole is large, the stress concentration exists in the joint of rocker arm root and lower package, the axial force of main material of rocker arm is generally large, and the axial force of inclined material is relatively small. The tensile force of each layer of waist ring increases gradually from the bottom to the top, and the tension of the inner pull and the anchor rope on the opposite side of the lifting weight is larger. The downwind vibration response of 20m long rocker arm under pulsating wind load is studied. MATLAB language is used to simulate the pulsating wind load of the long rocker arm at the highest working height. The pulsating wind load time history curve is introduced into ANSYS and applied to the structure with APDL technique. Newmark- 尾 method is used to solve the problem. The results of wind vibration analysis show that the wind vibration response of 20981 nodes at the extension end of the long rocker arm is obvious, the maximum displacement response is 0.493562m, and the maximum acceleration response is 0.233967m / s ~ 2. The results of the analysis can be used to guide the establishment of the construction plan of the buckling tower group. Through the study of bearing law and wind-induced vibration response of rocker boom, the conclusion can provide reference for the design and construction of similar projects.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH21

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