多层直埋供热管直管段的应力特性分析  

Stress Characteristics Analysis of Multi-layer Directly Buried Heating Pipe Section

作　　者：刘松涛 张成 张攀 郝闪 李思瑶 Liu Songtao;Zhang Cheng;Zhang Pan;Hao Shan;Li Siyao(College of Hydraulic and Electric Power,Heilongjiang University,Harbin 150080,China;School of Civil Engineering,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学水利电力学院,哈尔滨150080 [2]黑龙江大学建筑工程学院,哈尔滨150080

出　　处：《特种结构》2023年第3期83-86,共4页Special Structures

摘　　要：为了更好地揭示直埋供热管直管段的应力及管周温度场分布特征,及探究内压、温差和埋深对钢管Mises应力的影响,建立相应的多层热力管与土的接触有限元模型,进行热-力耦合分析,得到了相应的温度场与应力场。研究结果表明:同一截面处,钢管的上侧有效应力值大于下侧,最大值位于上侧中心线处;钢管的应力主要受工作温差和内压的影响,受埋置深度的影响较小。In order to better reveal the stress in the straight pipe section of the direct buried heating pipe and the distribution characteristics of the temperature field around the pipe,and explore the effects of internal pressure,temperature difference and buried depth on the Mises stress of the steel pipe,the finite element model of contact between the multi-layer heat pipe and soil at corresponding temperature rise was established,and the corresponding temperature and stress field were obtained through the heat-force coupling analysis.The results showed that the upper effective stress is greater than the lower effective stress at the same section,and the maximum value is located at the upper center line.The stress of steel tube is mainly affected by working temperature difference and internal pressure,and is less affected by buried depth.

关 键 词：直埋供热管道 Mises应力 有限元模型 热-力耦合 

分 类 号：TU833.12[建筑科学—供热、供燃气、通风及空调工程]