风帆式联合出线构架结构设计与分析
发布时间：2018-07-14 20:16
【摘要】：变电站构架是变电站内重要的建筑物之一,主要用于悬挂站内外各类导地线。国内现有构架种类较多,技术相对成熟,但是一直存在占地面积较大的缺陷,随着国家城镇化进程发展,地价昂贵,变电站建设费用逐年增高,因此必须要改变以往的出线方案,压缩出线间隔,减小构架的占地面积。受双层出线构架启发,针对户外GIS变电站,创新性设计出了风帆式联合出线方案,通过与电气专业配电装置的优化相结合,将传统的水平出线改为立式出线,较常规构架减小占地面积达50%。由于立式出线较常规的水平出线更为紧凑,使得单跨结构受导线拉力增加一倍,因此构架柱内杆件布置型式显得尤为重要。采用连续结构拓扑优化中的人工密度法优化风帆式构架平面布置型式,以构架柱为轮廓将优化模型简化为一块板,设置合理的位移约束条件,以体积最小化为优化目标,通过保留所有指定密度阈值以上的单元,得到构架平面内的最优布置。针对构架三层出线特点,研究了两种端撑布置形式对构架位移的影响,并进行了优选。对比分析了常规构架柱顶节点和新型柱顶节点的结构型式,结合钢结构经济合理、安全适用、确保质量的设计准则,提出了全新的梁柱节点构造方案。依据构架型式和节点布置方案建立整体构架有限元模型,根据不同工况组合统计出的各位置最不利应力比。结合结构力学性能和钢结构构造要求,确定各部分结构型钢型号,并选取钢管的连接法兰。分析了新型构架的支反力、应力比、位移和屈曲系数等力学性能。并在线性屈曲失稳计算结果基础上,分析构架在侧向风作用下的非线性失稳情况。利用多重Ritz向量法计算结构的振型基频与振型参与质量,采用地震设计反应谱法校核了结构在地震作用下的强度和刚度。建立构架梁柱节点三维有限元模型,分析其在控制工况作用下的应力和变形情况。结果表明风帆式联合出线构架安全可靠,经济合理。
[Abstract]:Substation frame is one of the most important buildings in substation. There are many kinds of existing frameworks in China, and the technology is relatively mature, but there are always defects of occupying large areas. With the development of the national urbanization process, the land price is expensive, and the cost of substation construction is increasing year by year. Therefore, it is necessary to change the previous exit plan, reduce the space of the frame. Inspired by the bilayer outline frame, this paper innovatively designs the windsurfing joint outlet scheme for outdoor GIS substation. By combining with the optimization of electrical professional distribution equipment, the traditional horizontal outlet line is changed to vertical outlet line. Compared with the conventional frame to reduce the area of up to 50. Because the vertical output line is more compact than the conventional horizontal outlet line, the single span structure is doubled by the wire tension, so it is very important to arrange the bar in the frame column. The artificial density method in topology optimization of continuous structure is used to optimize the plane layout of the sails frame. The optimization model is simplified into a plate with the outline of the frame column, and the reasonable displacement constraint condition is set, and the volume minimization is turned into the optimization objective. By retaining all the elements above the specified density threshold, the optimal arrangement in the frame plane is obtained. According to the characteristics of the three-story frame, the influence of two kinds of end-brace arrangement on the displacement of the frame is studied, and the optimum selection is carried out. This paper compares and analyzes the structural types of the column top joint of the conventional frame and the new type of column top joint, and puts forward a new construction scheme of the Liang Zhu joint combining with the design criteria of the steel structure which is economical and reasonable, safe and applicable, and ensuring the quality. The finite element model of the whole frame is established according to the frame type and the joint arrangement scheme, and the most unfavorable stress ratio of each position is calculated according to the different working condition combination. According to the structural mechanical properties and structural requirements of steel structure, the steel type of each part of the structure is determined, and the connecting flange of steel pipe is selected. The mechanical properties of the new frame, such as support force, stress ratio, displacement and buckling coefficient, are analyzed. Based on the calculation results of linear buckling instability, the nonlinear instability of the frame subjected to lateral wind is analyzed. The fundamental frequency of vibration mode and the participating mass of modes are calculated by using multiple Ritz vector method, and the strength and stiffness of the structure under earthquake action are checked by seismic design response spectrum method. The three dimensional finite element model of Liang Zhu joints is established, and the stress and deformation of Liang Zhu joints under controlled working conditions are analyzed. The results show that the windsurfing joint outlet frame is safe, reliable and economical.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63
本文编号：2122827
[Abstract]:Substation frame is one of the most important buildings in substation. There are many kinds of existing frameworks in China, and the technology is relatively mature, but there are always defects of occupying large areas. With the development of the national urbanization process, the land price is expensive, and the cost of substation construction is increasing year by year. Therefore, it is necessary to change the previous exit plan, reduce the space of the frame. Inspired by the bilayer outline frame, this paper innovatively designs the windsurfing joint outlet scheme for outdoor GIS substation. By combining with the optimization of electrical professional distribution equipment, the traditional horizontal outlet line is changed to vertical outlet line. Compared with the conventional frame to reduce the area of up to 50. Because the vertical output line is more compact than the conventional horizontal outlet line, the single span structure is doubled by the wire tension, so it is very important to arrange the bar in the frame column. The artificial density method in topology optimization of continuous structure is used to optimize the plane layout of the sails frame. The optimization model is simplified into a plate with the outline of the frame column, and the reasonable displacement constraint condition is set, and the volume minimization is turned into the optimization objective. By retaining all the elements above the specified density threshold, the optimal arrangement in the frame plane is obtained. According to the characteristics of the three-story frame, the influence of two kinds of end-brace arrangement on the displacement of the frame is studied, and the optimum selection is carried out. This paper compares and analyzes the structural types of the column top joint of the conventional frame and the new type of column top joint, and puts forward a new construction scheme of the Liang Zhu joint combining with the design criteria of the steel structure which is economical and reasonable, safe and applicable, and ensuring the quality. The finite element model of the whole frame is established according to the frame type and the joint arrangement scheme, and the most unfavorable stress ratio of each position is calculated according to the different working condition combination. According to the structural mechanical properties and structural requirements of steel structure, the steel type of each part of the structure is determined, and the connecting flange of steel pipe is selected. The mechanical properties of the new frame, such as support force, stress ratio, displacement and buckling coefficient, are analyzed. Based on the calculation results of linear buckling instability, the nonlinear instability of the frame subjected to lateral wind is analyzed. The fundamental frequency of vibration mode and the participating mass of modes are calculated by using multiple Ritz vector method, and the strength and stiffness of the structure under earthquake action are checked by seismic design response spectrum method. The three dimensional finite element model of Liang Zhu joints is established, and the stress and deformation of Liang Zhu joints under controlled working conditions are analyzed. The results show that the windsurfing joint outlet frame is safe, reliable and economical.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63
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