埋地热力管网非线性复合有限元力学模型及其热胀内力分析  

A NON-LINEAR COMPOSITE-ELEMENT MODEL FOR THERMAL STRESS ANALYSIS OF BURIED PIPELINES

作　　者：王进忠[1] 

机构地区：[1]天津大学力学系

出　　处：《天津大学学报》1991年第2期58-69,共12页Journal of Tianjin University(Science and Technology)

摘　　要：假定土壤对管道的纵向摩阻力服从双线性规律,对端部有弯头、伸缩式补偿器或支墩的埋地管段建立了含有节理或刚臂的非线性复合单元模型,考虑到扁平效应及内压对弯头柔度的影响,编制了平面埋地热力管网热胀力通用计算程序。给出了算例,得到了令人满意的结果。The axial frictional resistance acting on the pipe is assumed to have a bilinear relationship to corresponding movement. For the pipe segment with an elbow、compensator or anchor, a non-linear composite element model composed of pipe segment、joints, etc, is established. The effet of flattening and inner-pressure on the flexibility of the bending is considered. Examples are given. Computational results obtained from this model are reasonable.

关 键 词：埋地热力管网 力学模型 热胀内力 

分 类 号：TK284.1[动力工程及工程热物理—动力机械及工程]