直埋热水管道锚固段局部屈曲有限元分析  

Finite Element Analysis of Local Buckling of Anchoring Section of Directly Buried Hot Water Pipeline

作　　者：陈涛 高明旭 丁利伟 孙蕾 CHEN Tao;GAO Mingxu;DING Liwei;SUN Lei

机构地区：[1]北京市煤气热力工程设计院有限公司,北京100032 [2]中国石化工程建设有限公司,北京100101

出　　处：《煤气与热力》2022年第11期12-15,共4页Gas & Heat

摘　　要：采用有限元分析方法,针对直埋热水管道锚固段理想模型(无初始缺陷)、非理想模型(存在初始缺陷——不圆度)进行局部屈曲有限元分析,验证根据CJJ/T 81—2013《城镇供热直埋热水管道技术规程》局部稳定性验算式得到的工作管实际壁厚的安全性。直埋热水管道锚固段属于缺陷敏感性结构,初始缺陷对工作管发生屈曲风险的影响比较大。按CJJ/T 81—2013局部稳定性验算式得到的工作管实际壁厚有足够的安全余量。Using the finite element analysis method,the local buckling finite element analysis is carried out for the ideal model(without initial defect),the non-ideal model(with the initial defect:out-of-roundness)of the anchoring section of the directly buried hot water pipeline,The safety of the actual wall thickness of the working pipe obtained according to the local stability checking formula of Technical Specification for Directly Buried Hot-water Heating Pipeline in City(CJJ/T 81-2013)is verified.The anchoring section of directly buried hot water pipeline is a defect-sensitive structure,and the initial defect has a greater influence on the buckling risk of the working pipe.The actual wall thickness of the working pipe obtained according to the local stability checking formula of CJJ/T 81-2013 has enough safety margin.

关 键 词：直埋热水管道 锚固段 局部屈曲 有限元分析 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]