大口径复合材料顶管接头应力分布模拟仿真  

Simulation of stress distribution in large-diameter composite material top pipe joints

作　　者：苏昊 周蠡 张超 SU Hao;ZHOU Li;ZHANG Chao(State Grid Hubei Transmission and Transformation Engineering Co.,Ltd.,Wuhan 430063,China;State Grid Hubei Electric Power Company Economic and Technical Research Institute,Wuhan 430077,China)

机构地区：[1]国网湖北送变电工程有限公司,湖北武汉430063 [2]国网湖北省电力公司经济技术研究院,湖北武汉430077

出　　处：《粘接》2024年第9期79-82,共4页Adhesion

基　　金：国家电网有限公司科技项目“无机高性能纤维复合材料电缆顶管设计与工艺研究”(项目编号:5200-202322138A-1-1-ZN)。

摘　　要：为探索大口径复合材料顶管接头应力分布规律,以武汉邓西220 kV输变电工程为背景,采用包含混凝土、凝胶材料、掺合料、细骨料、化学增强剂和超细金属纤维的大口径复合材料顶管,并应用Midas/FEA仿真软件建立顶管接头有限元数值模型,模拟不同加载条件观察接头处应力分布情况。结果表明,顶管接头内外表面上的轴向与环向应力分布水平极为相似,且内表面的轴向应力峰值略低于外表面,环向应力峰值则高于内表面。随着管壁厚度的增加,顶管接头径向应力表现出两端压中间拉的变化特点。顶管接头应力分布具有不均匀特点,距离接头中心位置越远应力变化越小。To explore the stress distribution law of large-diameter composite pipe jacking joints,taking Wuhan Dengxi 220 kV power transmission and transformation project as the background,large-diameter composite pipes including concrete,gel materials,admixtures,fine aggregates,chemical reinforcing agents and ultra-fine metal fibers were used to jack pipes,the finite element numerical model of pipe jacking joints was established by Midas/FEA simulation software,and the stress distribution at the joints was observed by simulating different loading conditions.The results show that the axial and circumferential stress distribution levels on the inner and outer surfaces of the pipe jacking joint were very similar,and the axial stress peak on the inner surface was slightly lower than that on the outer surface,while the circumferential stress peak was higher than that on the inner surface.With the increase of the pipe wall thickness,the radial stress of the pipe jacking joint showed the change characteristics of compression at both ends and tension in the middle.The stress distribution of large-diameter composite pipe jacking joints had the characteristics of non-uniformity,and the farther away from the center of the joint,the smaller the stress change.

关 键 词：复合材料 大口径顶管 接头 本构方程 有限元分析 

分 类 号：TQ317[化学工程—高聚物工业]