第48卷 第4期 西安建筑科技大学学报（自然科学版） Vol.48 No.4
2016年8月 J.Xi'an Univ. of Arch.& Tech. (Natural Science Edition) Aug. 2016
收稿日期：2016-01-25 修改稿日期：2016-08-25
基金项目：国家青年科学基金项目（51208059）；陕西省科学技术研究发展计划基金资助项目（2013K13-02-01）；陕西省住房和城乡建设厅科学技
术计划基金资助项目（2014-04）
作者简介：江超（1984），男，博士生，讲师，主要从事供热直埋管道应力分析研究 ．E-mail:15091336209@126.com
DOI：10.15986/j.1006-7930.2016.04. 021
直埋热水供热管道三通热-力耦合分析
江 超 1，官燕玲 1，邓顺熙 1，王 军 2
(1. 长安大学环境科学与工程学院，陕西 西安 710054；2. 西安市热力总公司，陕西 西安 710016)
摘要：针对直埋热水供热管道三通受力的复杂性，基于土弹簧模型建立了热-力耦合有限元模型，分析了直埋三通应力的主
要影响因素，并给出了简化三通接管长度的热-力耦合有限元模型．建模中管土相互作用考虑了介质本身的重量和覆土重力
等的作用，三通管段的边界条件施加在主管和支管端头．结果表明，直埋三通在温升作用下，相贯区峰值应力较大；直埋三
通的二次应力随温升、管道壁厚、支管管径、主管过渡段长度变化，而受内压影响较小；地面荷载作用使三通最大当量应力
减小，对三通起保护作用．该结果旨在为直埋管道的安全性提供帮助．
关键词：直埋供热管道；三通；热-力耦合；有限元分析
中图分类号：TU995 文献标志码：A 文章编号：1006-7930(2016)04-0585-08
Analysis on the T- joint thermal coupling for
directly buried heating pipeline
JIANG Chao 1, GUAN Yanling 1, DENG Shunxi 1, WA N G J u n 2
(1. School of Environmental Science and Engineering, Chang′an University, Xi′an 710054，China;
2. Parent Company of Xi′an District Heating, Xi′an 710016，China)
Abstract: To study the complicated stress characteristics of T- joints in directly buried heating pipelines, a thermal-mechanical
coupled finite element model was constructed using the soil spring model. The main affecting factors on stress distribution of directly
buried T- joints were analyzed. A thermal-mechanical coupled finite element model for T- joints with reduced straight pipe lengths
was given. The weights of thermal medium and covering soil were considered in the pipe-soil interaction of the model. The boundary
conditions were applied to the ends of the main pipes and the branch. The results indicate that the junction area of buried T- joints
bears peak stress with high value due to temperature rise. The secondary stress varies with temperature rise, pipe wall thickness,
branch diameter and the length of partly restrained section. The internal pressure has little effect on the secondary stress of T- joints.
The ground load, which decreases the maximum equivalent stress of buried tee joint, is benefit to the buried pipelines. The findings
of this article aim to provide aid for security analysis on buried pipelines.
Key words: directly buried heating pipelines；tee joint；thermal-mechanical coupled analysis；finite element analysis
受周围土壤的位移
直埋热水供热管道三通热-力耦合分析（论文）.pdf
