基于有限元分析的CNG储气井疲劳设计计算  

Fatigue Design of CNG Storage Well Based on Finite Element Analysis

作　　者：宋成立[1] 淡勇[1] 

机构地区：[1]西北大学化工学院

出　　处：《化工机械》2013年第3期330-334,378,共6页Chemical Engineering & Machinery

摘　　要：采用有限元方法对储气井危险部位——套管与管箍螺纹连接段进行分析,应用ANSYS软件计算,获得了该部位详尽的应力场。通过经验公式和理论推导给出了交变应力幅S与疲劳寿命N的解析表达式。在此基础上,进行了一系列的修正和安全系数的设定,最终获得了CNG储气井的疲劳设计曲线,最后,给出了考虑疲劳累积损伤问题的方法和设计依据。The finite element method was used to analyze threaded connection between the gas storage well＇ s casing pipe and the clamps thereof, and through ANSYS, the detailed stress field of this connection was attained. Basing on the empirical formula and the theoretical derivation, the analytical expression of the alternating stress amplitude S and fatigue life N was presented, and on this basis, a series of amendments and the setting of the safety factor were implemented to eventually win the fatigue design curves of the CNG storage well, including the solutions to the accumulated fatigue damage and the design basis.

关 键 词：储气井 CNG(压缩天然气) 有限元 疲劳设计 

分 类 号：TQ053.2[化学工程]