液氨储罐局部腐蚀应力场有限元分析与安全评定  

Finite Element Analysis and Safety Evaluation of Localized Corrosion in Liquid Ammonia Tank

作　　者：张莹光[1] 李蕊[2] 林玉娟[1] 刘长海[1] 

机构地区：[1]东北石油大学机械科学与工程学院 [2]大庆石化公司热电厂

出　　处：《化工机械》2016年第4期500-507,544,共9页Chemical Engineering & Machinery

基　　金：国家自然科学基金项目(11272084)

摘　　要：在液氨储罐筒体与下封头连接焊缝处和下封头应力集中处分别建立了面积相同的方形腐蚀坑,运用ANSYS15.0有限元软件对该结构进行分析,得出它受到均匀腐蚀后的应力分布。对两处腐蚀坑应力最大值处的危险截面进行线性化分析,最后基于JB 4732-1995(2005确认)进行安全评定。Establishing same-sized square corrosion pits at the weld connection between liquid ammonia tank＇s cylinder and bottom head and the bottom head＇s stress concentration area was implemented. Through analyzing this structure with ANSYS15. 0 software,the stress distribution after uniform corrosion was obtained,including the linearization analysis of the dangerous section in two corrosion pits and the safety assessment based on JB 4732-1995（ confirmed in 2005） Steel Pressure Vessels Analysis and Design Standard.

关 键 词：储罐 腐蚀坑 有限元 线性化分析 安全评定 

分 类 号：TQ053.2[化学工程]