蒸汽管道刚性支吊架应力分析  

Stress analysis on rigid hanger of steam pipeline

作　　者：宋战兵 范佩佩 魏江 刘宝林 李根[2] 种道彤[2] SONG Zhanbing;FAN Peipei;WEI Jiang;LIU Baolin;LI Gen;CHONG Daotong(China Datang Northwest Electric Power Test and Research Institute,Xi'an 710065,China;Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]中国大唐集团科学技术研究院西北所,西安710065 [2]西安交通大学,西安710049

出　　处：《华电技术》2019年第4期1-5,13,共6页HUADIAN TECHNOLOGY

基　　金：国家自然科学基金重点项目(51436006)

摘　　要：火电机组蒸汽管道支吊架的变形和应力集中对管道和设备安全具有重要影响。采用有限元分析方法,对某300 MW燃煤发电机组蒸汽管道刚性支吊架进行三维建模,针对额定工况进行稳态研究和不同变负荷速率的瞬态过程研究,得到了刚性支吊架的温度场、热-结构耦合应力场及变形量的分布。结果表明:额定工况下刚性支吊架的最大等效应力达190. 1 MPa,应力集中主要发生在管夹、支座和螺栓处;快速变负荷运行时,螺栓和管道处等效应力有较大的变化,分别达109. 0,122. 1 MPa;管夹、吊杆和支座处等效应力变化幅度较小;变负荷速率对等效应力变化幅度的影响很小。The deformation and stress concentration of steam piping hanger are important to the safety of pipeline and equipment in the rmal power plants.Finite element analysis is adopted to conduct 3D modeling of steam piping rigid hanger for a 300 MW coal-fired generating unit.Steady state research is carried out under rated working condition and transient processes of varying load rates are studied.The temperature field, thermal-structural coupled stress field and deformation distribution of the rigid hanger are obtained from the studies.The results indicate that the maximum equivalent stress of the rigid hanger is up to 190.1 MPa under rated working condition,and the stress concentration mainly occurs at pipe clamps,supports and bolts.When the load changes rapidly,the equivalent stresses of bolts and pipes change greatly,reaching 109.0 MPa and 122.1 MPa respectively.The equivalent stresses of pipe clamps,hanger rods and supports changes lightly.Changing load acceleration has little effect on the range of equivalent stress variation.

关 键 词：火电机组 蒸汽管道 支吊架 应力集中 变负荷速率 温度场 三维建模 有限元分析 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]